Classic immigrant story. They always take the physical labor jobs. In the 30's the Japanese were the landscapers in Southern California, they worked hard for their children and their children became doctors, lawyers, and other professionals.
Look landscaping and roofing aren't exactly "piece of cake" jobs that every American kid aspires for and it looks like the Mexicans are filling a niche, especially since Atlanta has boomed since 1990.
As another industry falls, you'll find higher welfare rolls among Americans, as well as the illegals who are making such low salaries with such huge families.
Thus, the connection equals the end of America.