Was Reagan that oblivious?

Lou Cannon tells us that Ronald Reagan could not possibly have been willing to use racism while having on occasion shown personal concern for blacks. Why, he even had a couple of 'em up to the house one time! OK, sorry, that's unfair, but even Cannon has to admit that Reagan supported continuing Jim Crow voting discrimination.

Uh, Lou, wake up. Even Reagan could not have been oblivious enough to fail to understand the symbolism of advocating states' rights in Philadelphia, Mississippi. If Reagan was not a bigot personally, he didn't mind bigotry much in others.