the problem was made years ago. now there is "family" already here for lots of the migrants. And they do not assimilate and learn the language because they form their own neighborhoods and districts; if I want to talk to them I need to learn Mexican Spanish. I noticed my neighbor had a bad accent when I first met him but it went away when he found me to be a decent person and not prejudiced against him. (one of the ones I like) Individually I like almost all the migrants I meet, but you cannot solve the world's problems by having everyone move to the US, (or Europe or Austrailia.).
There is also an upswing in diseases thought to be gone because these people bring them in; nothing against them, it is their health system that failed in their own country.