I see nothing being resolved here.
Just let it go and don't provoke him next time by talking back, just keep your mouth shut.
I've never retaliated or taken it out on another, and I'm sure many other players are the same way, including you. We just wanna play the game. The Game suckas!
But people are dicks, I've been killed many times just because, not for loot or caps, just... because. You wanna see some real mean cursing and swearing motherfuckers go read YouTube comments, those guys are real dicks.
Just chill and let it go, you filed your complaint now go have fun. If he's a real issue other players will stack complaints with yours and the GM's will deal with it.