Some of these guys who are now about to get into plum positions in the White House hold unapologetic racist views.
They, frankly, would like to go back to some era when America was the only country with skyscrapers. If you try too hard you might end up in an era with no smartphones. Such precision carries the Chinese threat.
They are a perfect match to the Chinese who were the leading country in the world in 1200. There are Chinese who do fantasize about going back to that era. They have a name for it, One Belt One Road.
For much of human history, except for the past 500 years, China and India were the leading economies on the planet.
But economies are not supposed to be ego massages! ("Mine is bigger than yours!") They are about families and livelihoods.
Unlike war economies are supposed to be win win propositions. The only valid ideology is the ideology of human equality.
Anti immigration has been the biggest unfair trade practice in the world. Goods and services can move around, money can move around, technology can move around, why not people?
Nobody really wants to deport Mexicans. The American economy will quite literally grind to an absolute halt if all Mexicans leave. They know that. The anti Mexican rhetoric is a tactic to keep the Mexicans working at below minimum wage. It is about cheap labor. At one point in American history there was similar anti Chinese rhetoric. They needed cheap labor to build railroads.
Racism is a tool of power. That is why it is strongest in places like the US Senate, Wall Street, and the liberal mecca Hollywood.
This is a globalized world. America is not an island. Minus Mexico it is not even a continent.