The point is you don't know how this person walks or talks, you only see a fragment of a conversation typically taken out of context. I hope you see the problem here, to say nothing of the problem with assuming someone is intrinsically evil unless they toe your specific line.
Furthermore I'm entitled to argue for what I think are good practices for communicating online, just like everyone else.
If people making jokes is a problem for you, there is a really fucking simple solution: don't get offended. You aren't entitled to people going out of their way to accomodate you. If you don't know if someone is doing something out of hate, assume they are not.
Outside of a context where the humor is understood by all like a stand-up comedy act, you aren't entitled to how other people perceive your behavior.
If you walk like a racist and talk like a racist, people are just gonna assume you're a racist.
If that's a problem for you, there's a really fucking simple solution.