Yes both sides have their share of bigots. Yet the Republican Party comes closest to endorsing the views of these terrible people while the Democratic platform is inclusive and equality based. For instance the party's oppostion to affirmative action and past presidental nominees opposing federal intervention for desegregation. But let us move past the past and look at today. While Senator Byrd was a member of the KKK, he has recently voted for affirmative action policies. While he is the President Pro Tempore of the Senate, it is a ceremonial role. If the Republicans controlled the chamber, Strom Thurmond would be it and we all know what a racist he is.
Yes the Republican Party is greatly endorsed by southern bigots. After the Democratic Party pushed civil rights in the 1960s, the South has consistenly moved to the Republican side. Last election, Al Gore did not carry a single state south of the Mason-Dixon line. Even when Bill Clinton won, he only split the south with the Republicans. A purging of southern Democrats from the rolls also shows that racists are more inclinded to become Republicans.
By the way, I don't run when the debate gets hot, I don't have enough time to respond. I'm sorry but I'll try to be quicker.