We are all actors on the stage of life.
Life is a theatre and people are the characters on stage.
There's an agenda to be peaceful, liked and pleasing to the other characters. Conflict and justified aggression is seen as immoral. I'm not saying be an asshole, just at the right times. Even then who are you an asshole too? The person standing in your way? Why care. It's either you or them.
However this theatre is an illusion. Instead we are on a battlefield. Every man, woman and child is out there for their own interest and gain in whatever they desire most. Feelings will have to be hurt to get what you truly want for yourself. You will get bit in this arena and don't take it personally.
At the end of the day do what you want. Just don't cry when you get scratched in war.