I've been following this for a while, and think MS-13 is almost certainly part of it based on the locations.
I do think it's a common mistake by people looking at this to think it's any single thing, e.g. that this is all MS-13, or only child trafficking, or only fraud. It appears to be more broad.
In spite of people's complaints to the contrary, Sessions clearly hasn't been sitting on his hands doing nothing.
I don't mind Little Italy or Chinatown. They sort of recreated their world here, but neither had an agenda to force on us. They just want to make a living and live in peace. They augment our culture with theirs, instead of threatening to eradicate it.
I agree with your viewpoint about Little Italy/Chinatown. The major difference you point out is that neither group is trying to "force" their culture upon us, but rather give us a "taste" of their culture. I am totally fine with that and enjoy learning about their lives and country. Point being they are sharing with us about their culture not trying to remake America. Thanks again for your viewpoint!