If one blows all the smoke away, one is left with the obvious question: Why not Trump? Trump is opposed by virtually the entire mainstream political establishment, Republican and Democrat, and by the entire mainstream news media, conservative and liberal alike. And yet he could win. That says something. It says that there is something there.
In the 1840s Karl Marx wrote that social revolution would involve "carrying out the thoughts of the past," in which "humanity begins no new work but consciously completes the old work". The role of revolutionary thought for Marx, in other words, involved drawing attention to how past revolutionary tasks were failing to be worked through in present political practice; of understanding the reasons why theory and practice had changed and, in turn, how this understanding could be advanced towards the (present) completion of the (old) revolution.