JP's tweet heavily implied he would react violently or argue with someone to their face if they say "cis" to him. The response implies JP would, in fact, do neither. JP would instead scurry off with maybe a mean glance and then whine for an hour from the safety of his podcast.

The response to JP is making fun of false bravado, toxicity, and whatever the word is for people that take everything as a personal insult - even a simple fact that JP is a cis man.

Granted, some people can deliver obvious facts in a tone that can draw blood. And some facts do cut into insecurities really deep.

But JP, based on his rhetoric should not be hurt or insulted by being cis. He is instead angry about people existing that are trans and threatening violence over a word.

So no, I don't think this is mocking men having or showing real feelings. It's mocking the talk-tough toxicity that gets pushed to cover genuine emotions.