Yesterday, 07:49 AM
That person? Not likely at all. But that person is irrelevant to the question you asked.
You explicitly prefaced your question with the conditional, "If Americans began doing it in proportions to give Themme pause "
As I noted, this presupposes (if only for the sake of argument) the existence of a sufficient "proportion to give Themme pause" - in which case, as I addressed in my reply, whether Theye will "lay down, give up, and go away" is contingent upon many factors.
One historical instance (in which Theye did not "lay down") gave us the bloodiest war in American history (the so-called "Civil War"). Another instance (in which Theye essentially did "lay down") gave us the nearly bloodless collapse of one of the most horrific tyrannies in human history (the Soviet Union).
But if instead you meant to ask, "Is there in America at present a sufficient proportion to satisfy the conditional?" then I think the answer is clearly, "No. Not at present" (more's the pity).