You wouldn't want someone you didn't know just stopping by for dinner with the family. Having alliens "visit our country", enjoy our special programs, and take sensitive jobs away from Americans is like having strangers for dinner.
WE DON'T NEED NON-AMERICAN'S IN AMERICA ! We already have Welfare States (Calif. & NY,) but we do not have a welfare nation...yet !
Click Here for an article about the Palmer Raids that deported dangerous aliens in the 1920's. There is an historical precedent for deporting dangerous aliens. We did it in the 1920's and we stayed a free, democratic nation.