I'm amused that you can't sus out the implications of demographic change for yourself.
First let's talk politically. Right now the Republican Party isn't winning a majority from any minority demographic. The best you do is with Hispanics at about 40%. If you can do math that's still a majority Democratic voting bloc. If the only population that still votes Republican as a majority (older and uneducated whites) itself becomes a minority then not even the electoral college can do enough heavy lifting to keep you politically relevant. And that goes hand in hand with the fact that younger, minority demographics who come from populations and communities that have historically been exploited by the first world support redistributive policies at a much higher rate.
Socially, your shit culture gets pushed more and more to fringes, more and more out of the mainstream and more and more at odds with it. The Confederacy goes into hospice and no one but a handful of forgottens give a **** and like all old and dying things you people get put in a rocking chair in the corner where you won't bother decent people.