I have debated with DA Morgan and have resisted responding to his very evident sarcasm, insult and lack of manners. At the most, I have accused him of bluster.

I would urge you to do the same.

It achieves nothing to deal with people in this way except give you a little short term pleasure for putting someone in their place.

And I would also suggest that warning someone of the dangers of mocking God is pointless if they have zero belief in God.

It's like me telling you that Santa Clause is going to bust you up if you say you don't believe in him.