If white folks want to show people-of-color that they oppose racism, they need to realize that being in the ranks of anti-racist activists involves negotiating 200+ years of white privilege and racial insularity.  White folk can't expect these negotiations to be stress free and easy, or expect to somehow become icons of struggle just for showing up in that white skin. 

Want  to leave no doubt about where you stand? Put your body on the line in a place where white power is normal and natural. Blood, bruises and arrest do a lot to assuage suspicion and ease the habit of insularity. I suspect that the AntiFa--I loathe the idea that anti-fascism is a fringe thing and not just a normal everyday American attitude--see themselves as doing exactly this.

They assume that fascists have the upper hand anywhere the state allows them to mass and demonstrate. And, to be frank, they're not exactly wrong, as Heather Heyer's death makes abundantly clear.