You are preaching to the choir when you are talking about the family reunification act. Even if you are talking about a small family of a husband, wife, and 2 children, then you increase the factor by 4. Three million becomes twelve million - and this does not include aunts, uncles, cousins etc.
There is also an estimated 15,000,000 illegal aliens of other nationalities out there. Vietnamese, Korean, Cambodian, Laotian, etc. They have already said they want the same treatment that the Mexicans get.
Can you spell 70,000,000 more people in America.