https://en.wikipedia.org/wiki/Sokal_affair
It's funny how this new generation of professional antiestablishers are using the same tactics (even though they would vehemently attach postmodernism)
It's all a power play really, when politics is involved. That's not science
I can think of two ways to interpret this, and I'm not sure which one you intend:
1. They hold modernist views, that there is a distinct and meaningful direction/progression for how societies must change over time.
2. They don't know what postmodernism means, and consider it a generic bad-word to attach to things they don't like. (Comic example: [0])
The Sokal affair was a physicist attacking the postmodernists for attacking physics (and scientific realism) by showing the postmodernists would publish complete nonsense.
The current attack is saying the physics establishment is backing a theory that doesn't adequately make predictions (not adequately supporting scientific realism).
It can be viewed outside the realm of power, that's a very postmodern view.
Anyone can feel free to provide examples of this happening, but I don't think there has been significant impact on scientific rigor in top theoretical physics journals and conferences as a result of needling from postmodernists, either during Sokal's time or now. If anything, his identification of "the Left" as the biggest enemy of science was profoundly off base in retrospect.