"Forgive them for they know not what they do" applies to anyone who believes in separation, because literally a state of ego-mindedness renders you unaware of what you are doing or why.
When you are whole minded you'll see the whole truth. Everything will be in its correct perspective. The truth will be obvious and you'll easily recognize it as true. And in contrast to it, anything that is not true will be very obviously false. There is no effort required in that, only awareness of the whole picture.
In awareness of everything, you need do nothing about the ego because you will recognize it is not real and doesn't exist. It merely needs to be seen for what it is, an illusion, which has disappeared and never was. It is made of nothing and is nothing.
But when separation is introduced to your mind, something else happens. It makes you unconscious to some degree. Separation is a form of denial or a block to awareness, so it blocks out awareness of some parts of the whole picture. It leaves you in a state of partial perception. It's like someone just hid a bunch of facts.
In particular, the truth, which was clear and obvious, becomes obscure and hidden. And without a clear awareness of the whole truth, you don't have a barometer to compare and contrast everything else to in order to find out if its true or false. It's like you forgot what reality is like, so now you're confused about whether what you're experiencing is reality or not.
Without the truth, and with key facts concealed by denial, your mind is now in a state where it is semi-conscious. It does not really realize it is not fully conscious, because it isn't aware of the stuff it isn't aware of. So it thinks it is fully conscious. Even a mind which is severely unconscious and limited still believes that it is fully aware of everything.
At all times, we believe that we're aware of the whole truth, every fact, every detail, and every piece of evidence, regardless of whether we are. Whatever we are perceiving we always believe it is the whole truth. And we are always assuming that we are 100% objective in our perception. We also assume that we are completely unbiased and perceiving clearly and without distorting anything at all, which is far from the truth when the mind has blocks in it (there are no neutral thoughts).
On the basis of this, we also then "make sense" of what reality seems to mean, based on the extent of our awareness, or the facts that we do still have access to. But if we don't actually have all the facts, something strange happens. We come to conclusions, trying to make sense of what we're seeing, based on what we are aware of. And if that means, that we are not aware of what is really causing something, we will try to come up with an alternative cause for things.
So because we're unconscious, we don't "see" that we actually cause everything, that we made the world, that we have orchestrated all events, and that we have attacked ourselves. The causality or the act of choosing to do that, is outside of awareness. So then it seems to us, in partial consciousness, that stuff happens seemingly out of nowhere, unjustified and uncalled for and unfair, as if it happens against your conscious will. It seems like another will has willed stuff to happen, without your permission, and so now you are victimized by it. Yet it it is your own will, unconsciously, making poor choices.
Based on this unawareness, and given only the limited information you have, you'll then try to make sense out of it, you'll assess the evidence, look around you, seek inside you for any sign that you made something happen, and failing to find awareness of such a cause or intention, you'll "rationally conclude" that it must've been someone else. You will then be convinced it's an external cause, or someone else willed against you, or the world did it to you, making you an unfairly treated victim.
This will all seem to make total sense to you. Because you're always trying to make sense of what you perceive, or to understand what it means based on the limited truth. So it seems to make sense, based on not having all the evidence, that other people are guilty sinners and they're attacking you and you are justified in revenge and anger.
You don't become angry on a basis of just being an angry person or as a random thing or just some reaction. You only become angry because to your consciousness, unable to see the full picture, it seems to make total sense to you that it is justified and correct and a truthful conclusion, based on what you're aware of. You look around you and do not see what you did to yourself, or any other signs that you chose it, and so this leads to obvious yet false conclusions about the scapegoats who must've been the cause.
You can't help it, either. In essence, you are not doing this on purpose to be an asshole. You're not intentionally, in your right mind, trying to be hurtful or scapegoat. You are actually simply acting very "naturally" in accord with the scope of your awareness and the resulting effect on your thought system. In essence, anyone who comes to believe in separation, MUST see themselves as being victimized. The mind simply cannot see itself attacking itself so its only option to so believe someone else is responsible.
It's pretty much automatic. Anyone with an ego will react with anger. Anyone with an ego will see themselves treated poorly. Anyone with an ego will hallucinate and be convinced that there are causes outside of their own will doing stuff to them. Anyone with an ego will see themselves as not the cause of problems, but rather at the effect of them, helplessly, and that this is indeed an unfair attack.
There is nothing special at all about the conditions and conclusions that arise in ego mindedness. It is completely predictable, and it applies to absolutely anyone who enters separation. It's like, if you choose separation, you are guaranteed to see yourself as being victimized. And anyone who does this will see themselves this way and will then react to these false conclusions of external causes.
This is why all ego behaviors are forgivable. They are forgivable because, literally, anyone acting in the ego in this way, as a victim or victimizer, MUST NOT see themselves correctly. They are mistaken. They are not aware. They are not aware of the evidence, they don't see the whole picture, they're not aware of what the truth is, they cannot see their own causal power, they are unaware of their own influence over their own perceptions, they don't even recognize their own identity, and they are very confused about what is what.
Any behaviors or attitudes that stem from this state of unawareness HAS to be forgivable, if you can be aware of the larger picture yourself and recognize the simple mistakes that people are making. A person is not trying to be an asshole attacker. They are actually quite naturally reacting and trying to make sense of their distorted reality, based on an inability to see the whole truth. They're literally doing the best they can, or at least are reactive very predictably based on their mental illness.
This is why anyone in the ego is forgivable. Anyone in the ego is simply mistaken. It does not call for attack or revenge. It does not call for condemnation or judgement. It does not call for making guilty or sinful. If you can be in the whole picture and aware of the whole truth, it is obvious once again what is what.
It's obvious that people hurt themselves. It's obvious that people think they know what is true when they don't. It's obvious that they are calling for help. It's obvious that they are confused and hallucinating. It's obvious that they think they sinned when they didn't. It's obvious that they are following perfectly logically consistent conclusions based on the limited information they have. And it's obvious they are not trying to be "bad" or evil on purpose, they're simply unconscious and mentally ill.
People are upset and angry and confused and lashing out only because they have come to believe false truths about what is really happening. They do not see. They are asleep. They think that something bad has happened to them unfairly and people are out to get them and they need to be afraid and defenses are justified and counter-attack is survival. They're acting completely logically and predictably based on their state of awareness, or rather their 'ignorance' of the whole truth. They simply do not know what they are doing.
This is why from the highest levels, you can only have compassion and be forgiving. Forgiveness is justified in the big picture because it recognizes and sees the whole picture, has all the information, can see who does what to whom, sees no victims, does not believe any of the distorted illusions or false conclusions, and simply recognizes that people are mistaken. Awareness of the truth shows you what is true and what is false, clearly and obviously.
All sins are forgivable, because even the idea of sin is just another part of being unconscious and not aware of the whole truth. Sins are forgivable because in truth they cannot cause consequences and have no real effects. Sins are forgivable because no-one can really sin and no-one has really sinned, they just think they have, because there is key information unavailable to them. Blocks to awareness are responsible for all mistaken conclusions.
We simply need someone to tap us on the shoulder the middle of our hissy fit,to remind us, hey.... that thing you thought happened, it didn't happen. You did not hurt anyone. You did not make bad stuff happen. Other people are not trying to destroy you. You actually are doing this to yourself. There is more truth that you do not see or realize. Everything is actually ok. God has taken care of everything. Nothing is out of place. You are still worthy of love. Everything is still exactly in its correct place and everything in heaven is still continuing without missing a single note in heaven's song. It's all good.