By Charles M. Blow I have a theory about the future of America that I don’t want to come true. It is a theory that worries me and that I have written about: that with the browning of America, white supremacy could simply be replaced by — or buffeted by — a form of “lite” supremacy, in which fairer-skin people perpetuate a modified anti-Blackness rather than eliminating it. The racist comments revealed this week on a recording of Latino leaders in Los Angeles — three City Coun