Because of the circumstances of the killing.
Black men & women have been killed by the police over minor crimes, over interactions where there's been no crime at all & while they're unarmed, handcuffed & incapacitated.
There was no need for the cop to have his knee on Floyd's neck. No reason for the cops to ignore his pleas that he couldn't breathe or the pleas from the crowd.
They ignored it because there's been a culture of black lives not mattering. There's been decades of no consequences, bad procedures & racial profiling. A few protests can't change something that deep overnight.
Esp when there's people like you who think black people are innately more violent & uncivilized. And part of a Jewish plan to wipe out 'the white race'.
You are spreading fear & hate. If you get some kind of sadistic power kick out of it, that's disgusting. And if you really live in a paranoid world where Jewish people are out to get you via all the scary black people - then that's tragic.
Do something decent with your life.
Even if Moz was the worst - he's still got songs to leave behind. What will you leave? Rancid racist posts.