I have come to the conclusion that for the left yelling "Racist!"

isn't just an accusation: it's a means of not having to think about why someone might disagree.

After all, if someone's a Racist!, who cares what they think, or why?  You don't have to deal with arguing the position, you don't have to see the other guy as human with thoughts, he's just the Evil Representative of Whatever, and you can dismiss him entirely.

That's a lousy way to pretend to deal with things, and in the long term I think they're REALLY not going to like the results.