Keyword being unduly

Dude tried to shit on someone with nonsense, I responded, albeit irked, with points and logic and all I got back was “huuuh” “whaaat” “I’m not gonna talk” which is classic troll bs as we’ve all seen on the rise, and called it out. I take that rule seriously (thanks for looking through) so I would like to talk about this in specifics if possible. What specifically did I say that was rude/uncalled for?