Yes. He's staying within bounds, but barely. One of the worst cases of an inferiority complex I've seen. One reason why I backed away from commenting. He is trying to instigate a flame war. Best advice? Reply to his comments, but ignore everything he says. He'll go ballistic as you continue to ignore what he has to say because it's unimportant. Bullies hate to be ignored. When he goes over the line, and he will, just hit the report button. He's been reported before, and sometimes behaves himself when he first returns. Don't bother threatening him with being reported: bullies thrive on that kind of attention.
On Usenet, I used to post memes totally un related to the bully's tiradecof the day.
I'd day the perfect response is to reply with NA recipes for various dishes. Quick Google, and you'll have a half dozen or more. As he gets angrier, post an Indian recipe for curry. I know, wrong Indians. He'll either leave and stop the disruption, because he's not adding anything, or become angry enough that you can report him.