I do think there is a concerted Mexican effort to gain back the land they lost in the 19th Century. I don't have the blueprints of their plan, but massive influxes of people are certainly a part of it. I also think that it is possible that there are officials on this side of the border who know and approve of their plans.
Business wants the cheap labor and the socialist left wants more drones....
Its a short sighted view to be sure, as both groups move to fulfill their own self interest.
Meanwhile those that see themselves as stewards of freedom and the Constitution grow more muted...The rightwing proponents brand us as isolationists, and left paints us as insensative....
And it appears as if 9-11 had little if any effect on the current paradigm