Deal with it by growing a pair and not trying to be "inclusive" on every issue. When such indirection is attempted, make it clear race is straw-man diversion unrelated to the matter at hand, then ignore all further blather about race from the lefty and stay focused on the real issue. Nine times out of ten, handling it that way will have your lefty opponent looking more and more irrational and less and less like he even understands the original issue. If anyone involved thinks you're "racist" for handling it that way, too bad, they've already taken sides so reach those you can. And, repeated applications of this approach ends up moving more than you may expect into the group you can reach.
Conservatives and republicans are not going to reach the zombified sheep, the brainwashed propagandized indoctrinated rank and file who vote democrat mindlessly brainlessly and by rote so why even attempt to get through to those idiots instead try to reach those that are willing to listen and learn what is true factual right and moral.