The UPS driver for my old office building told me trumps not racist or even appealing to racists , he wants to build the wall because there's an underground supercomputer in Mexico thats going to open a portal to hell and flood the world with demons.
This sounds like something from a Tarantino movie where the demons start pouring in, but there is a fence. Since there are no fences or walls in hell, none of the demons understand it so they turn around and go home.