+5 Yes, Puerto Rico is widely considered a colony—or often described as the world’s oldest colony—due to its status as an unincorporated U.S. territory. While residents are U.S. citizens, they lack voting representation in Congress, cannot vote for president,

Maybe but that specific reasoning is provably wrong, using actual crime statistics
The reasoning is that few immigrants - just like in the local population - will be committing criminal acts. I don’t think the crime statistics show that there are no criminal acts committed by immigrants as well. But maybe I have misunderstood you. What exactly is your point?
Crime statistics generally show immigrants charged for crimes at a same or lower rate than non-immigrants. There is no validity to the claim that immigrants cause crime.
Immigrants appear to be people, doing pretty much what people do, and maybe keeping their head down to avoid unwanted attention