The Turing test has completed. This account has failed.
You might not agree that Black lives matter, but it's not a conspiracy theory. With BLM, people are opting in to a social movement rooted in observed police violence. QAnon is not tethered to reality in the slightest.
Some Black Power and Black Israelite proponents do seem to believe that a very literal, criminal conspiracy is involved in oppressing Blacks, going far beyond the mainstream characterization of "racism". To be sure, these views are not exactly widespread or mainstream in the BLM movement - but they're probably at least as common as belief in the Qanon story.
>but they're probably at least as common as belief in the Qanon story.
Why do you believe this is probable?
I think that any sufficiently popular movement will have fringe extremists. QAnon has fringe extremists at its core.
Well, the BLM movement's theory is that the U.S. government - the police especially - are secretly racist, don't believe black lives matter, and are conspiratorially targeting black people just for being black (in spite of mounting evidence to the contrary). That's not too far away from my understanding of the QAnon conspiracy theory that there's some "secret society" of bilderbergers or illuminati that are pulling the strings behind the scenes.
I wouldn't characterize it as a belief that the police are secretly racist. More that they are openly and demonstrably racist.