Let me be clear, I don't care if someone posts something racist, sexist or offensive. Resorting to personal attacks in response is against the rules. If you feel the need to get some personal revenge, it is at the risk of getting yourself banned.
If you have a problem with a post, inform me. I am happy to look into it. But responding to trolls by upping the vitriol serves no purpose other than promoting a subjective set of standards by which to moderate the community. I am not interested in allowing some people to be insulting and kicking others for the same offense. It's a simple rule... attack the argument, not the person.
We are all relatively faceless, here. You, almost surely, only know about each other from what they have chosen to show you. It could all be an act, and it could be deliberately misleading. Pretending you "know" the nature of another individual here is like pretending you "know" an actor by a role they have played. So quit, already. Quit pretending you understand the natures of others here. You know nothing, Jon Snow.
If you can't confront the argument, then walk away. Do not stoop to insults. It's boring, trite, and destructive for communities. Stop it.