Might we say that the 'hashtags' etc have prompted an increased or more overt stating of what was held before, in the form a a 'louder' backlash, against what was already held?
I think there is an element of backlash, certainly. A lot of the things they claim to have always been communal values actually
haven't always been values, for instance, or at least haven't been for as long as they claim. Many of the ideas the MAGA crowd trumpets around as Western culture or White culture are no older than the 1950s really (the push to get or keep women out of the workplace for instance), and many are straight up copycat concepts that try to piggyback on the effectiveness of civil rights slogans without understanding what really makes them resonate. And I'm sure that's what the author of the original post meant to express, even if they (in my opinion) ended up overstating things. But I mean, this sort of copy-cat politics does happen sometimes.
They see black history as an intrusion on the college campus, for instance, so they want an
equally intrusive trafficking of white nationalist ideas on those same campuses, even if they sort of already had it for most of US history, and have no real plan for what they'll do once they actually secure that sort of platform. The kind of thing they are pushing for when they say "Hey, Why isn't there a White History Month?" wouldn't have occurred to anyone to request in 1915, because the mainstream curriculum was entirely in line with the assumptions they already carried about their racial identity. But in 1995, they are pushing a weirdly exaggerated version not as a serious pedagogical suggestion but as a strained
tu quoque argument. They'd fight each other like dogs if they had to actually sit down and write an accreditable course outline of record for a White History Month model curriculum. No blacks or gays required, just the nazi types sitting in a room by themselves would eat each other alive before they ever produced a third draft. I mean, just wait til someone brings up the fact that Marx was a white European and Jesus was not... So those kinds of constructions, since they don't have any real tangible existence outside of the debate itself, definitely were created purely as rhetorical ricochets, after the fact of civil rights, not reclamations of anything that went before.