Again, the difference is that none of those slurs are associated with lynchings.
I would never deny that blacks were treated badly. But most immigrant groups who arrived en masse were treated badly by the groups who were already here, including the Irish, the Scots-Irish, the Italians, et cetera. There was even a Supreme Court case involving whether German immigrant children could use the German language in school. Each had a distinct culture, cuisine, way of dressing, and various permutations of religion. Eventually, all those groups assimilated, and it wasn't just because of skin color. It's really time for the black race pimping to stop. They need to pull their weight, police their own group and stop making knee-jerk excuses for criminality and immorality based solely on skin color.
Really? There's a causative link between the two? I never knew that! I must have missed all the rappers lynching each other left and right!