Looking at usA problem we have relating to one another is that we tend to look at one another through the lens of ourselves. By that, I mean we assume that because we are similar, we are the same; that if we do a particular thing, our motivation to do it must be the same; that if we say we feel something, it must feel the same.
We do not well understand that we can be different. An extreme of this inability to put ourselves in others' shoes comes when we look at the truly bad. We try to imagine how we could kill, how we could torture, and of course we cannot picture it at all. So we invent possession by "evil", as though there was an elementary force that could enter and twist another until they could do what we cannot.
Sometimes that force, that impulse, is not "evil". We believe it is religion, or colour, or culture that makes a person do or be what we cannot. Those things do go to make us what we are but I think that we do not understand that were we religionists, or that colour, or brought up in that culture, we might not do the same things, feel the same way. After all, people are not homogenous, even when they seem the same to us. One is cruel; the other kind. One is generous; the other mean. Of course, these things mould the material we are composed of. I believe we are born relatively formless and become what we are. But that does not mean that the same circumstances make us the same.