Back to the topic at hand and ignoring the illiterate: The GOP's raging hard-on for needing something to oppress aside - I'm still trying to figure out 'why?'. A policy like this isn't future proof - it'll likely get overturned by the next time the Dem's get control of the government - and it doesn't rally anyone to him who wasn't already going to vote for him; which the 'caravan of Hispanic Invaders' rhetoric did well enough even if they decided to drop that talking point.
All it does is go 'Yeah, fuck these people in particular because I said so' which... is actually entirely in character for Trump's GoP so nevermind I guess.