Everything is racism with the left.
Because it works. It shames the weak minded, emboldens the faux-outraged, perpetually aggrieved race hucksters, and turns any debate into a spit flying shouting match.
It also hardens the hearts and resolve of those who will not be cowed or diminished by it.
When you call everyone who disagrees with you racist, you create that which you seek to destroy.
It used to work. People just don't care anymore.