I think it's a good idea to try to think yourself into other people's heads, try to work out how they tick, rtergardless of how you disagree with them. Imaginary role play.

It just seems so obvious, I've been trying to work out why some people seem to see it as a sort of treachery, justifying the unjustifiable and so forth. I suppose it must be some idea that if you think yourself into someone's way of thinking, you might get stuck there.

There's a section in one of Chesterton's Father Brown books about this very thing.

"The secret is," he said; and then stopped as if unable to go on. Then he began again and said: "You see, it was I who killed all those people...So, of course, I knew how it was done...

"...I had planned out each of the crimes very carefully," went on Father Brown. "I had thought out exactly how a thing like that could be done, and in what style or state of mind a man could really do it. And when I was quite sure that I felt exactly like the murderer myself, of course I knew who he was...

"I mean that I really did see myself, and my real self, committing the murders. I didn't actually kill the men by material means; but that's not the point. Any brick or bit of machinery might have killed them by material means. I mean that I thought and thought about how a man might come to be like that, until I realized that I really was like that, in everything except actual final consent to the action. It was once suggested to me by a friend of mine, as a sort of religious exercise. I believe he got it from Pope Leo XIII, who was always rather a hero of mine...

"...No man's really any good till he knows how bad he is, or might be; till he's realized exactly how much right he has to all this snobbery, and sneering, and talking about 'criminals,' as if they were apes in a forest ten thousand miles away; till he's got rid of all the dirty self-deception of talking about low types and deficient skulls; till he's squeezed out of his soul the last drop of the oil of the Pharisees; till his only hope is somehow or other to have captured one criminal, and kept him safe and sane under his own hat."