The 'local laws' to which you refer are unconstitutional.
Horsecrap. Using the logic of the judge in the Hazelton case, local communities could not enforce state traffic laws such as requiring registration or insurance. It is pure nonsense.
Huh? Does that mean that I don't have to pay local property taxes?
Do you know that the judge in the Hazelton case cited "foreign agreements" in his argument? In other words, the Hazelton laws would violate agreements with mexico. Think of the doors that opens for the terrorists and illegals from all over the world.
On another note, why should we import millions from one culture and no others?