America should turn everything over to blacks and Mexicans. Let them be in charge of the whole country for a while. Government, sports teams, all the corporations, the education system, everything.
Then, sit back and see how long it takes for society to completely collapse. I doubt it would take very long. When they get a taste of what life is like without their white benefactors/scapegoats around maybe they will quit their bitching and show a little gratitude.
Collapse would take less than a year.