If that were true, I would expect the demographics of the supporters of the current administration to be skewed towards immigrants, especially from Central and South America, and I would expect to see opposition to the current political climate from the demographics most culturally different from those- non-immigrant, white males.

But it seems to me the opposite is instead true. Are you perhaps suggesting the non-immigrant, white males supporting the current political climate look up to the immigrants as role models?

Yes, but that is an entirely separate phenomenon from the one I was raising.

Immigration is not the reason the U.S. is not losing the Lockean "rule of law and property rights" layer.

It's losing it because other ideas have come to predominate the intellectual landscape.