how to solve the problem.
don't let the fuckers in through the gates.
install a "take a number" wheel, like at the dmv.
https://www.amazon.com/Take-A-Number-System-w-ticket-dispenser/dp/B01BMS7HN6
keep the kiddies in mexico. and when their number is called then you can interview them and do whatever you want, but still
don't let the fuckers in.
let them camp in mexico and be mexico's problem
Also, do not speak in spanish to them only speak in english, only give them their paper work in english. if they say "no comprende" it makes it that much easier to say no.