Perhaps the leading candidates could echo this brilliant post. If Paul is so repugnant they should come out explicitly against Paul’s and his supporter’s racism against minorities and seek to bounce Paul and his 10% out of the party. Those few thousand won’t be missed and think of the millions who will look to the GOP as the true saviors of America. Just an idea, maybe you could e-mail your post to the campaigns.
I don't see any reason for the candidates to raise the spectre of Republican racism, but if the Dems or the media raise it, that's precisely what you'll see. Like Reagan, Bush I, Bush II, and the RNC they'll reject the ideology and it's supporters. Happened before, will happen again.