If the Founders had been serious about a whites-only United States, they would have sent back or hanged all of the negroes and exterminated the injuns. Indeed, if we were serious, that’s what we would do. But that would have cost a lot of money, and perhaps more importantly, they thought it would be un-Christian.
Not doing so, however, has consigned the posterity they pretended to care about to being doomed demographically. Such are the hazards of a raceless worldview.