The criminal element is one piece of the issue, is it not?
South America and the Caribbean are about 8% of the world's population. They somehow account for 20% of the displaced people in the world. Cuba, Haiti, Nicaragua and Venezuela are complete failures due to the repression of their people. The system is totally overwhelmed and lacking both alternatives and action. Our immigration system as it is needs improved and augmented, and part of that is due to years of inaction.
I'm in full agreement that criminals need sent away. I would also say that we need more ideas and manpower down there on multiple fronts because the issue at hand has more layers than that. I understand the narrative is that some people just want to set criminals free like the second half of Dark Knight Rises, but I can confirm that I personally do not want that nor do I really know anyone who does. I get that it gets twisted, probably on purpose, but that's why I don't tend to go around calling people Nazis and fascists.
Not to mention, the border is just the beginning. I think we often forget that immigration doesn't simply end there.