I'm not the one who framed it as a race issue, am I? The issue is almost certainly one of class; cops are paid well and are likely to live in middle class neighborhoods. The drag-races likely most common in lower income neighborhoods.
true class is how someone conducts themselves, not their color, neighborhood, job, or income.
is it nice to stage street takeovers or is it dangerous and thugish? what did the "cops" do that was questionable, except perhaps show too much restraint?
And street races are unquestionably dangerous.