Because fuck the Jews
These people should be seen mostly as Soros employees. Antifa and Black LIves Matter are the same Soros employees wearing different hats on different days.
Looking at the Rasmussen Trump support numbers, you're seeing this week at least, strong support and overall support of Trump by Blacks of 25/35, Whites around 35/47, and Other Non Whites somewhere around 40/50.
That's pretty close, there isn't some huge racial divide there.