It is true that there are more differences across party lines on policy questions such as on affirmative action, again with a mix in both parties but with more Republicans than Democrats opposing. I don’t consider these types of policy preferences to be grounds for calling someone a racist, however.
It is undeniable that some Americans are racist but racists split about evenly across the parties. No party has a monopoly on racists.
http://marginalrevolution.com/marginalrevolution/2012/08/racism-by-political-party.html
