My argument is that if the Nazis were able to round up people en masse using technology that would by modern day standards considered crude, it’s perfectly reasonable to assume the US should have no problem rounding up illegals using modern technology.
We have the NSA, iPhones, electronic paper trails etc.
I mean you have sloth posting articles stating how much illegal immigrants contribute to taxation, how much welfare they collect and yet rounding them up is some highly impossible, expensive task?