IQ is subjective. I have seen a sub literate man completely rebuild a Volvo engine of all things, I have seen people like that able to tie a fly and always have a fat string of trout, don't know the difference from Iraq or Iran, though. Illiterate and simple darker people can make beautiful music. There used to be a need for artisans, and many of them are immigrants. The Irish, just see the Gangs of New York. Migrant workers of the type you mention, well, why are people hiring them? Thats how they get in. The majority of illegals in this country walked through the border as a worker or a visitor, and never went back. Or a shopper, a domestic, etc. Obviously they are useful to someone. I judge by morals also, but not IQ A child cannot help it if they hit the ceiling intellectually at the age of 10, but they can mature in other ways, and fix your transmission to boot. Filling the country with welfare recipients to get them to vote is more retarded a policy then anyone coming here, whose smarter? As far as the criminals, just turn them away, any male between the ages of 13-30 (if they live that long) should be detained, period. We did that to Muslims and we can do that to terrorist drug cartels and their minions that they send to the US to establish control of inner city neighborhoods. They aren't sending sub humans, in God's eyes who they are is all that matters. But they are sending criminals, a lot of them.