You cut welfare for a generation, then the blacks will resort to even more crime to "survive" and cause untold suffering and even death to actual productive members of society. Possibly to the point of causing the machine of society to actually struggle to function.

Be a man and call for actual genocide/full deportation of a racial group, or find a better option. Don't take this passive "oh I'll just let it sort itself out over the course of a century and everyone else can suffer massively until it maybe does."