I don't think you're being controversial. I think you're absolutely right. We can't blame only one group of people, we are all guilty of lashing out and hurting others at one time or another.

Also, I truly do not think there is such a thing as true altruism. Don't we all do "nice" things to make ourselves feel better? No matter how self sacrificing a person is, I think that in the end they are "guilty" of deriving some pleasure out of their self sacrifice for others.

So, I don't think there is such a thing as pure "niceness" for niceness' sake.