I don't see it that way. From my perspective, America would be more stable socially if it balkanized. There is a lot of tension borne of cultural heterogeneity. Coasts vs South, most of Texas vs Houston, etc. Nothing about it is positive, except maybe economically.

I guess this might lead to wars via a more cohesive national identity, like how diversity in the workplace reduces unionization efforts, but I largely doubt it would turn out so poorly.