“The right-wingers are just playing like there’s nothing serious at stake.”

Yeah, remember when the social conservatives used being offended as a political weapon?  And then it got mocked and treated as non-serious by their rivals on the Left?

Well, the social Left adopted being offended as a weapon, too, at the same time, so of course the response is going to be mock it and treat it as non-serious.

This is going to be especially common where there is no expectation of good faith.