No idea but it mainly appears to be nonnegotiable. It's not really pure post modernism that is the problem. In fact, many of the derivatives of it we see being reified today use it as a base (deconstruct everything) but are not pure in that they create their own meta-narrative, which post modernism was explicitly against.

Regardless, the backlash to it is potentially so much more damaging and I hope these people understand the type of fire they're playing with. Identity politics plays both ways and mixed in with classic conflict theory, well it doesn't tend to end well.

I'm optimistic that as these frameworks for how the world works are (easily) exposed as the frauds they are and how they are hurtful to a society versus other methods (like universalism and liberal-science approaches) which have worked and will continue to, we'll taper down a bit the discourses. There's some good bits in these philosophies too, to be sure and hopefully they survive.

In the end they'll fail because they have no way of constructing a coherent, functional world, much less a peaceful multicultural one. It's just a matter of how many people die to get to that realization.