Sheesh, Surber You conveniently overlook the fact the Republican party was formed partially to end slavery, that Republicans fought a war costing us over 600,000 American lives to end slavery, Republicans set up Reconstruction in the South to assure civil rights for blacks post bellum, and Democrats created (or ignored the creation of) terrorist organizations to make life hell for blacks after the army pulled out of southern capitals in the 1870s.
More realistically, it seems most blacks have somehow been unable to move beyond a plantation mentality and still live on the Democrat plantation that “cares” for them cradle to grave.
Liberals and Washington, DC came to the “rescue” during slavery and Jim Crow and this has proved stronger than the fact that liberal ideology contradicted the socially conservative ideology of blacks throughout most of history. This is reinforced by the fact that members of the Klan and other anti-black organizations are almost totally more likely to vote Republican than Democrat despite mainstream Republicans not supporting such groups.
And lastly, the perception is reinforced when certain comments are popular with conservatives such as calling blacks the most racist group, unable to take care of themselves, genetically less intelligent, etc. These can unfortunately make the most open minded black person feel unwelcome.