Let me add to your argument on education levels.
Several widely published surveys claim that LEGAL immigrants have a higher rate of college education than native born Americans.
What those surveys do not mention is that almost all legal immigrants come from Third World countries.
Overwhelmingly, their degrees are not accredited by American employers.
Overwhelmingly, college educated immigrants have worked only for their home government and have no experience in a competitive economy.
More importantly, 25% of the adult LEGAL immigrants who enter this country annually lack even a high school degree. We are literally importing hundreds of thousands of high school dropouts annually, which explains why more than 50% of immigrant headed households with children are on at least two major welfare programs.