sorry z, but you are very very wrong.

example: making them all legal would be impossible. a large number of them are criminal types, or they just don't trust the govt. not that i do. not to mention that there are a helluva lot more here than any census could prove. also even if we were to give then citizenship, it would only show to the rest that they don't need to go through the legal processes in place at all. just show up. th system is not fool proof by any means though.
people like me believe that if they were to be legalized that they need to pay back taxes, which is also impossible to regulate or legitimize. some immigrants go through to process to become citizens, but to unload 20 million plus on our already overloaded community system would be a fiasco from hell.
if we give them citizenship, they will lose almost all of their free entitlements from which they could never recover from financially. kinda like a student slave loan. basic economics here, nothing new.
i say let them apply for citizenship just like all the other immigrants and quit sucking all the freebies, there isn't any money there. yeah it's a pain in the ass to go through this process, but it faaaaaar outweighs their obvious other choices.
i hope this makes sense to you, because i don't feel the need to give you an American economics lesson