As a person with Marxian leanings I can tell you it's not "back in vogue" in fact in both academia and general populace actual Marxist theory has probably never been less vibrant or popular?
Maybe some people get that impression because they've conflated "Marxism" with general socialist urges or even cultural "left" wing identity politics, but that in fact is proof exactly of the opposite. It's never been more heretical to advocate for wealth redistribution or dismantling or restricting parts of the capitalist market, even in the context of a total ecological crisis brought on by industrial production and exponential growth.
It's not even on the table of discussion in any western country, so I am not sure where you fear comes from. That a claim like this could be made shows me exactly how far to the right we've drifted since e.g. the 60s. That someone like Mamdani could be smeared or red-baited as a "Marxist" for advocating for rent control is hilarious really.
(But frankly I'm not here to debate the merits or get into a drive-by debate with your half-formed opinions, nor was that the aim or thrust of what my comment above was about.)
