I would be truly surprised to find people who find BLM as dangerous as the KKK. Either or, but not both.
I think the KKK is functionally irrelevant in today's society. They're dangerous where they have numbers, but they're not any kind of wide-spread or looming threat.
Black Lives Matter is another ball of wax. I am fully convinced that a substantial portion of its core leadership, such as it is, ARE racial supremacists. They just happen to be Black rather than White so they're "Reverse-Racists" as some would term it. So in that respect, as their political power seems to be growing, while the KKK remains irrelevant, BLM is "the bigger threat" not that it is much of a threat either.
That the other typically expected "Social agitators" (socialist, Marxist, Stalinist groups) also have fingers in the pie just adds to the hilarity of the matter with it comes to "Alt-Right" vs BLM and associated left-wing groups. As most of those "Alt-Right" groups actually aren't particular right wing, at least on "the real American Political Spectrum." It just happens that the more ("racial"/"religious") libertarian tendencies of American Conservatives provides them "cover" under which to operate and spew their crap.
Much like some other ("social") libertarian tendencies(re: "Alternative lifestyles") present on the Democratic side and enable some toxic groups over there.
But most of the toxic stuff coming from the Dems has nothing to do with Libertarians and more to do with a weird amalgamation of 19th Century political philosophies and Oligarchs. While the remaining toxicity on the Republican side is simply corporate greed and corruption.
Reality is the "Alt-Right" basically is the National Socialist Party v2.0 and just a fascistic as before. There is nothing conservative, or libertarian about it as it relates to the American Spectrum(where they should be properly classed as left-wing). And they're fighting against BLM and "The Social Justice Warriors" who basically are both shills("useful idiots") for the not-dead-yet international communist movement.
So it's almost like watching Nazi's vs Commies in Germany circa late 1920's in the Untied States at the moment. With it being really weird because the vast majority of Americans are neither Commies, or Nazis and I don't see it really "going anywhere" despite how much the media may try to push the narrative in pursuit of ratings.
And the people who think Trump is a secret Nazi are being retarded, but hey, its what the narrative is so whatever. He IS a bully, he IS an idiot. He is a lot of other less than desirable things. But seriously, people really need to take a few dozen steps back from where they've positioned themselves.
But I doubt that they will, it will be "entertaining" to watch the SJW's go insane when nothing meaningfully changes in the 2018 election cycle for Congress. I fully expect the Republicans will lose a few seats in the House but retain a majority, and gain (net) a couple seats in the Senate further cementing their majority there. Nothing like a "mixed result" that keeps the Republicans in control of Congress to get those activists motivated for 2 more years so the insanity can continue.
And now that I've had my moment on a soapbox, I would also add that without regard to which side of the political axis an author may or may not be on. It is generally a good idea for fiction authors in general to avoid turning their stories into political manifestos. This goes back to show don't tell. When authors go into "manifesto mode" it invariable turns into a whole lot of telling.
Unless you think you can rival George Orwell. But even then, keep in mind that while his comparisons were "obvious enough," he didn't make direct references all the same. As he decided to show instead of telling.