"The fact that some white athletes joined in doesn't make it less a black issue."
Nor does it support YOUR claim "he would hardly be calling for the firing of black athletes ". Why didn't you say "he would hardly be calling for the firing of ATHLETES? "
"And you're defending that"
Yeah, right. YOUR comment is about ME, now? Nice try. 
When caught in an exaggeration best just let it slide. Trying to defend an inaccuracy with speculation and attempts to turn the tables doesn't work. Sorry.