To the political left, racism isn't about hating someone based on the color of their skin. Because if it was that, then they'd have to acknowledge that Black Lives Matter, Antifa, and in fact, even much of the Democratic Party is racist for their treatment of white people.
Rather, to the left, racism means "prejudice plus power." So in other words, only the majority can be racist, because only the majority has power. That's a convenient way of excusing their own behavior and hatred, and in fact, even justifying it.
That last point, by the way, is why the left doesn't see anything wrong with violence directed towards anyone they ***perceive*** as racist. To them, they're fighting a battle against evil, just as most conservatives see little or no problem with violence directed towards Islamic terrorists. (A "liberal Christian" actually made this very argument to me the other day -- she justified the violence of Antifa by comparing it to the wars and battles that we're fighting and have fought in the Middle East; to her, violence was justified as long as it was directed toward a perceived evil, without any regard for whether that violence was being carried out by a government in an act of actual war (Romans 12) or by an individual who simply didn't like the country in which they live (which goes directly against Romans 12).)
But to take it back to the beginning, what does the Bible teach? First, there's only one race -- the human race. And second (for our purposes here), love your neighbor. Love even your enemy. There's no exception in there for "loving your neighbor unless he's part of a racial group that has more political or social power than you have." The command is simply to love your neighbor, period.
What modern racist theory advances is actually a quest for power -- which is an idol -- rather than the selfless, raceless, colorless love to which God calls all people.
"For I did not shrink from declaring to you the whole counsel of God." (Acts 20:27)