I think the thing you need to content with is the fact that when someone says the Republican party uses racism to win votes what they're doing is linking you to a wiki page with long and detailed documentation of the specifics of what they're doing and how.

Now, in response to that you sort of just wave around and claim all parties use racism. But that's not actually true is it, there is no similar concerted strategy on the Democratic side to stir up racism to drive votes- and this is born out in the numbers where one party has a very out of the norm demographic appeal.