Technically, if we could create this “Black State” in an already Blue state, it would benefit conservatives and the Republic. The fact that it would always go 80-120% Democrat every election would not increase in the number of electors, and would remove liberal votes from other states, moving them further into the “Red” column.
And the blacks there would only have other blacks on which to prey.
There would, however, be a high chance of cross-border raids where the perpetrators were protected by the ‘authorities’ of this state.
That said, we already have a “Black State.” It is called Liberia. Delta is ready when they are.
Most black-run cities are dismal failures. Most black-run countries are dismal failures. How then can they assure us that these new black-run states won’t also be dismal failures?
Personally, I think I’d go with your idea of reintroducing Liberia as a black homeland. Just to make things fair, I’d take every penny we’ve spent on the “black community” for a period of 5 years and use it to transform Liberia into the crown jewel of Africa. Give the black folks who want their own homeland someplace really fabulous that they’ll be eager to move to. After the 5 years are up, they can sink or swim on their own.
And Haiti.