Oh, just remebered, another thing what truly makes me hate people is them telling what I can't do.
My mother didn't believe that I would ever become a doctor, yet alone come into the university I was applying to. She said that I was "too stupid" and "not capable enough to ever succeed". It turned out that I managed to come into the specific university on my first try, and three years in I am slowly but steadily getting my degree. However, I literally hated my mother for a long time and even when I was accepted into the university I didn't forgive my mother for not believing in me, even when she continued to apologize and say that she was wrong. I think I acted too selfishly at my part, since I did put my own mother through much pain, but I couldn't bring myself to forgive her, after eevrything she had said, that I wasn't good enough. I did eventually forgive her, only last year actually, though I can't say that our relationship is similar to how it was before, and I doubt it will ever be.
I think a part of the problem is me, since I take these kinds of things too seriously. It's not like I start hating people if a person says "I bet you can't throw this rock X meters." No, but I do grow very detached from people (especially ones very close to me) who states that I can't do something when it comes to personal goals that I want to achieve. And my own mother not believeing in me crushed me.