What do 40 million illiterate peasants from south of the border really contribute to the USA?

It is highly likely many of your own family tree were poor and illiterate. They did not bring down the world trade center. A huge majority would fight in future U.S. conflicts. The Mexican government uses the U.S. as a dumping ground. Any protests clamping down on immigration should be held in Mexico not in the U.S. In the near future this minority of Americans will become the majority. Huge declines in the U.S. birth rate will push Hispanics into the majority by 2050. Muslim births are sky-rocketing worldwide. 2nd generation illegal or legal Hispanics will dominate the future of the U.S.