It's hard to tell how serious you are, based on the first couple of words, but that tactic seems to have failed. Racism is widespread and, according to some data and personal experience, has broadened and deepened in the last few years.
If we want something to change, we'll have to act. African-Americans are only ~1/7th of the US population - not enough to make changes themselves.
Oh really? Black americans are totally disempowered to make any changes at all? I couldn't disagree more, and object to your denial of agency to these people.
Nah man, I think just being not-bigoted and intolerant of directly witnessed bigotry is good enough.