The formulation of "our" civilization being at risk from "somebody else's babies" is a deliberate suggestion that American civilization is threatened by unnamed "others" - almost certainly a reference to non-Westerners. The idea that national identity and racial identity overlap entirely is the crux of white nationalism; King's formulation above toes close to that line, if it doesn't cross. American culture, of course, was formed over the past two centuries by the assimilation of immigrants from a broad range of nations - first mostly European but later a broader diaspora. Iowa, the state King represents, remains one of the most homogeneously white in the United States.