For years the republican pary has been painted as the "whites only country club" political party where blacks were not welcomed. The sad part is that there were republicans like that and they enjoyed the precieved exclusiveness that the republican party supposely gave. And you know once black people get even inkling that they are not welcome we tend not to forget or forgive. And thats to bad because I don't think that any blacks were argue against lower taxes, school choice, welfare reform, strong defense or a host of other conservative ideas.
Plus you need to remember the blacks form the backbone of the democratic party, and both white and black democratics have a lot to lose if blacks start switching over to the republican party, thus the lies and half-truths that are started about what the republicans are trying to do to black america. I'm sure everybody has seem the stories about trying to take us back to the old days when civil rights were non-existent, problem is that no republican has even come remotely close to putting forth anything that would come close to rolling back what we have gained from civil rights.
So there, it is an emotionally charged issue where facts are discounted and meaningless charges are used to race bait people into voting democratic even when it is apparent that the democratic party takes us for granted.