The whole "Democrats are the party of racism because past Democrats were racist" argument is stupid, pointless, and irrelevant. Yes southern Democrats supported racism in the past, but the party as a whole switched over to the other side and fought against racism. The modern Republican Party also supported racism in the past, so both parties weren't perfect. But I'd say 99% of the modern day racists are in the Republican Party. Racism is rooted in conservatism, the modern Republican Party is the more conservative of the two parties and Democrats are more liberal today. The southern states which were mostly Democratic prior to the 60's are now mostly Republican and those people didn't change their views on racism either. The Democrats just became the Republicans. 95% of black voters vote for Democrats, that is larger than any other group including Latinos and gays. To say that they are voting for racists because of the past is just insulting to them. The Republicans bringing this up are just projecting and stupid. In fact modern day liberal Democrats should take credit for all legislation that fought racism even if it was passed by Republicans. Democrats are the new "Party of Lincoln" since most Republicans would reject Lincoln's legacy.
Any Republican/conservative who brings that point up is full of crap and are using it to cover up their own racism, period.