Good point and makes sense. Its not 1850 anymore and we're running out of room.
There's only so much prime real estate in this country, and the more people we add, the smaller the percentage of Americans who can live in the best places.
Doesn't sound like a way to increase prosperity for us or our children.
Of course, those people who own lots and lots of real estate, will be telling us how noble it is for us to share America with more and more immigrants, which happens to raise the price of their property--a happy coincidence, I'm sure.