I don’t think you fully understand what BLM is really about.
Anyway, American public opinion is breaking BLM’s way.
So while I won’t state today that BLM is “as American as apple pie” (too early to make that historical judgment), I will say that movements for freedom and civil rights in this country have a long and storied history
Each and every one of them was opposed vehemently by the conservatives of their time
Check out these anti-suffragette “memes” from 100+ years ago for comparison’s sake
imgflip.com/i/460kfz