But seriously, folks...
Trump's proposal is asinine, but then, he is a nine-ass. He is a petulant, petty, wannabe dictator, on a good day. Under current law, illegal entry is a misdemeanor. Literally, a citation offense. Yet, a certain portion of the population, including in the White House, can't distinguish that reality from serious criminality (which is occurring in that self-same White House). They can't distinguish asinine from a hole in the ground.