Then you would be very wrong. When you look at average IQs from other countries you'll see that most are below the US ... and keep in mind that Trump was right when he said these other countries are "not sending us their best".
https://iq-research.info/en/page/average-iq-by-country
Keep in mind that the sweet spot for violence is around average 85 (and this doesn't take into account MAOA-L and CDH13 genes, which are more common in Latin American, West Asian and North African gene pools ... and lets not even get into the issue of inbreeding going on in all three places pushing IQ's even lower).
People from low IQ populations when transplanted into higher IQ populations are set up for failure worse than an inner city ghettto kid dropped into an Ivy League college. When these people inevitably fail they will do two things 1) demand more largess from the state and 2) start raping, robbing and murdering (look at the situation in Europe with "refugees").