Indeed, a clear indication that the meme was the reason, or at least part of the reason, to deny admission would have a very serious weight, and hopefully grounds for the reversal of the decision, and a disciplinary action.
You are talking about the US administration here, which is currently making up rules as it pleases based on the whims of a geriatric maniac, and where masked kidnappers are abducting people off the streets without repercussion. None of what you said is likely to happen.
I agree that the top of the administration is plenty rotten, but I still believe that rank-and-file people in governmental agencies did not lose their dignity, at least those who had it.