"Why shouldn't I ? Tell me why I shouldn't". Comes off as a little defensive.
Anyway, fucking up really has nothing to do with it. Some people are for lack of a better term assholes. Assholes don't deserve respect and I'm not going to give it to just anyone.
At the same time I'm not going be disrespectful to them, it's common courtesy. I think we may agree a bit not that you've explained.
Now if you wanna go starting the "respect doesn't exist" argument that's fine but you're on your own because goes down a long and dreary road of philosophical b/s that ends up with nothing existing and mankind merely a figment of some giant's dream.