So that means you're overdoing it, people will just think you are tough or that you are trying to act tough and test you. People that know you in real life will know wether you take bullshit or not. I also doubt you've got any haters, just some funny guys at school perhaps.
That depends, if he was literally shitting on my mother or hurting her I wouldn't just watch. I don't really care about trash talk though.
Like JTManiac said before, it all depends on the situation.
I don't think black people in holland are branded for fighting .