There is much more to this than meets the eye.

What if the Wall is not just to stop illegal migration, but is also a necessary military fortification? What if there are Chinese bases in Mexico. What if they're planning an invasion of the US during the collapse of the dollar?

The Russians have stationed nuclear-capable bombers in Venezuela.

We and the Chinese are nearly at war in the South China Sea.

We keep poking the bear by having MILEX on their border.

Perhaps Q has some insight.