Nah, I think that even white people are starting to get fed up with the cops getting off scot-free every time they kill a person, which is a privilege that most people, even those who are law-abiding gun owners defending themselves and their families, do not have. I can personally attest to the fact that police brutality affects white people as well. People are sick of being bullied and murdered by jackboots and would rather police themselves.
The overall reaction to George Floyd just feels...different. Save for some "let's wait until all the facts emerge" viewpoints, the actions of the officers here have been pretty roundly condemned.
The Ferguson case was a he said/she said hoopla where the coroner’s report actually ended up backing the officer’s testimony, but by that point, Michael Brown had already been turned into a martyr for long simmering resentments over police misconduct.
I wonder how the politics of the BLM movement would have played out differently if the trigger was a far more damning event like this one. Granted, the Eric Garner incident was only like a month before, but Michael Brown ended up becoming the real poster child for the movement in its early days (the whole “hands up, don’t shoot!” chant, which almost certainly didn’t actually happen).