The Mariel boatlift in 1980 was a precursor to this current situation, under the Carter administration. It sometimes helps, to read a little history to get perspective. Eventually, you'll realize there are higher powers manipulating the executive branch, and repeating the same things with minor variations, every 30-40 years.
Fidel Castro did empty his prisons and mental wards, laughing to the media that they were criminally insane. A large amount of Haitian boat people that were previously denied asylum, under Nixon & Ford were let in under Carter... Even though they had been denied because they were "economic" refugees. The media has spent decades rewriting history to hide the criminality of the boatlift people, and have whittled it down and diminished the negatives as much as possible. Plenty of people still remember, though... And back then there was actual journalism, unlike now.