Invasion has been bad for American Indians in the past. They sense it will be bad for them in the future. American Indians are the original nativists, even more nativist than native-born whites:

The nerve! Where do they get off thinking this land is their land, anyway?

Thanks to commenter t, with an appropriately laconic handle, for the heads up.

GSS variables used: LETIN1A(1-2)(3)(4-5), RACECEN1(1)(2)(4-10), HISPANIC(1)(2-50), ETHNIC(30)