You are delusional. Even if we totally locked down the borders yesterday, we will be majority-minority by mid-century. We probably will be plurality hispanic by the end of the century. Republicans must win a competitive share of minority votes to remain viable. I don't put any of our current minority groups out of bounds, but given the size and growth rate of the hispanic population, it's vital to be competitive there.
I am NOT suggesting that we abandon our principles, but either we find a way to win minority voters over, or the dems will have succeeded in importing a permanent liberal voting majority.