I wouldn't be against separation because our country is too stubborn and uneducated to be able to resolve this state of the country any other way. But yeah, the red states would absolutely be destined to fail. LA and NYC make up so much of the National economy money wise. Those Midwest states like South Dakota not making any money. A lot of down south states not making enough impact on the economy to survive if we all split and it's every state for himself.
also, if we do split we gotta make all sports leagues that are predominantly black local only. You can only watch these leagues if you live in a racially equal state. And you can't listen to black musicians if you live in that state too. Let's see how much they love white supremacy when they're watching rugby every Sunday and bumping post Malone in the whip
None of this is happening without new borders, and there are a lot of aspects that come into play when we are talking about separation.
Militarily, how does the transfer of technology under the control of the US will work? Who wants to end up like Ukraine who gave up its nuclear advantage only to see their nuclear neighbor carve out a section of their territory while their allies watched?
What happens when it's time to create partnerships with the outside world (trade and security agreements)? As of right now, the only countries I see supporting a separate Black nation are countries I wouldn't trust with my two eyes open (Russia and China), and if such an alliance happens, it would only be one of convenience with much of the benefits - destroying the geographical defense advantage of the US, as well as its global influence - going to those two nations.
How much leverage does a Black American nation get out of seceding from the US? Do we end up like Haiti, where a debt is legitimized by the threat of isolation from whatever is left of the US and its economic and military partners?
Internally, there are no guarantees that all the economic actors that give so much power to the cities will migrate their services and infrastructure to this new land. It is much more likely that new industries will have to be created from scratch to support this new nation, and that takes a stable geopolitical environment. We've seen how an openly segregated country reacted to its minorities getting better and richer; I don't expect a different reaction from a neo-confederate US.
Finally, it is highly probable that, like the EU is treating the UK with Brexit, whatever remains of the US will do the same to this Black nation to discourage further attempts at separation.
And rugby is better than football. I said it. They can have baseball.