Daniel Greenfield attacks the question in his article, Dances With Confused Elephants.
The Republican Party doesn't poll poorly with minorities because its
party members wear hoods and jump out of cars in minority neighborhoods
while shouting "Boo". It polls poorly with minorities because the
Democratic Party has built up an extensive infrastructure in minority
communities, backed by a national and local media presence.
George W. Bush, John McCain and Mitt Romney were not racists, but if you listen to the media and have no opinion of your own, you might get that impression. And if you're a member of a group that experiences racism and your community leaders and role models tell you that they are racist, then you have excellent odds of believing it.
Clarence Thomas, Herman Cain or Ben Carson are not going to fundamentally change that because the problem is not really in the Republican Party. The problem is that the other side has an extensive investment in depicting Republicans as racist and it controls much of the media and academia. [snip]
The left is not interested in gay marriage because it believes in marriage, but because it believes in destroying all existing social institutions. A Republican Party that fails to grasp that has no clue where it is or what it's fighting. [snip]
The Republican Party can go fiscally conservative and socially liberal and the joke will be on it, because a socially liberal society of broken families and absent values is naturally dependent on the Nanny State. Trying to be fiscal conservatives in a socially liberal society makes as much sense as trying to sell burnt Korans to Mecca
Read it all here http://sultanknish.blogspot.com/2013/03/dances-with-confused-elephants.html