I respectfully disagree. The Republican Party was full of racists long before Bush.
If I had to single out one republican for the sorry ass shape the party is in today .. it would be Richard Nixon .. who made the party a home for the racists who destroyed it.
With all due respect, your theory does not hold water.
If it did (hold water) there would never have been any Reagan presidency if it was all Nixon's fault.
You may not like Nixon and neither do I, but Nixon had little or nothing to do with race relations in America.
If anything Nixon by scaling down the Viet Nam War saved a myriad of Negros from cannon fodder over there.
Thus unintentionally Nixon is an unwitting friend of Negroes.
The man whom you have most to blame for GOP racism in America is LBJ.
When LBJ turned the Democrat Party into his own personal vehicle for civil rights reform he chased all the prominent southerners out of it and into the GOP. The GOP has been racist ever since, and therefore the GOP has not given a rats azz about Negroes ever since.
While the Negro issue is merely a footnote in contemporary American political history, it is a very significant and useful minority available to the Democrats now. As are the Jews. As are the Gays/and/Lesbos. As are American Muslims. Sorry if that sounds harsh.
Right at this moment the females are the most powerful component of the American Body Politic. This also includes Negro females in the case of Hillary because she and Billy Boy and of course Obama himself have always supported the rights and needs of Negroes. And the GOP cannot compete with that.