If a large group of blacks voted en masse for a black nationalist who preached hatred of whites [View all]

and, in so doing, helped to swing the election for a different candidate one way or another (since never in a million years would a black nationalist who preached hatred of whites garner enough votes to win anything), would white Democrats (or white Republicans for that matter) spend any serious time and effort "reaching out" to those black voters and tell their supporters they should be more sympathetic to their concerns and try harder to understand and embrace them?

Or would they say, "those people are crazy" and then do their damndest to generate enough votes from within their ranks and elsewhere to ensure that they could outvote the "crazies" the next time around?