No actually mexicans were part of America and Mexicans were just another tribe in America. As for turning this country into a third world slum, that would mean developing a time machine and going back to the time of the Cold War. The third world was countries that did not align themselves with the West nor Russia...I personally don't want to align with the original illegals (Europeans) nor would I want to align with Communist Russia so really being third world in it's definition is not so bad! Also you attacked me for not being able to read but you used "u" and spelled third wrong "third" and you also had an incomplete sentence "Mexicans were not here before us in fact if you learn history Mexicans have only existed." Have only existed...? Don't ever tell me I cannot read, when you can't get spelling and grammar at a level of at least a middle schooler, I am not going to deny that we all make mistakes but on your level is way to much especially if you are attacking people for not being able to read. Oh and why would this country turn into a slum, what do all Mexicans create slums or are Mexicans a slummy people, it seems like the World Bank/IMF and other capitalist entities are creating slums around the world not immigrants or Mexicans.