I am certainly guilty of being snarky, sarcastic and rude. I apologize if that gave anyone the impression that I would ever condone this sort of behavior.

That is not a real apology. To me, it reads as, "I have behaved badly. I'm sorry that you interpreted my bad behavior the way that you did." So yeah, he still doesn't get it and he obviously has no interest in getting it or in truly making amends.