Yes, it is absolutely true that anger is a human act and it gets angry at something like a person who is without a job, he is not getting a job and he is tired of looking for opportunities and If there is no money in the account, he gets irritated and gets angry, and besides, as you just said, you don't like injustice and even if someone is being treated unfairly, you get angry. If yes, then it is a good thing that you are attacked by someone who does injustice, it means that you are a good person.