Others are unkind, and I am unjust. Is this idea normal?

This idea is wrong. I can't be unjust if others are unkind, because I am a licensed citizen (with benevolence and morality), because I am a person with personality, because I have moral norms. His unkindness is his business, and my injustice is my business, my moral problem and my personality (split personality). Only in this way can I write well.

Otherwise, he is heartless and you are heartless, otherwise, he is unjust and you are unjust. People are like sick people (or mental patients)

), just like a mad dog bites you, don't you lie on the ground and bite the mad dog? Will you be Japanese? Will it be safe?

The word "benevolence, righteousness and morality" is the basic principle and the most basic point of being a man. What would you do as a man without virtue and morality? If you tell the truth, animal behavior has rules.