The founding fathers believed in violent protests up to and including a violent revolution if the goverment were determined to be too corrupt and broken too far from the constitution to be recovered by lawful means. People who imply you can't be a legitimate protest unless you're peacefully standing around waving signs and doing nothing else while the people you protest look out their window and make faces at you are incorrect. Burning down cities and looting businesses while forgetting to even make demands of your government, however, does not count as a protest or assembly of any kind. It's the literal definition of a violent riot. No matter where you stand on protests and assemblies, the BLM riots don't qualify as a protest. "End racism" is not a thing the government can just slam a hammer down and achieve. It'd be like rioting because there are no free commercial flights to the Andromeda galaxy, except that demand could actually be worked toward and one day realized. Even if it were possible to one day make people only consider other humans by the character of their person and nothing else, BLM can't actually make up its mind about what it wants when it says 'end racism', so it can never be satisfied.