It's like throwing a party. You can't let just anybody in and you can't let the party get too big and out of control.It's sad to see that some people have let their Know-Nothing hysteria get so out of control that they hate their own ancestors. WTF?
If you run out of food the party will get out of control.
Do we have enough jobs? Do they pay well? I know employers will say they need more workers/immigrants because they don't want to raise wages to steal workers. Thats less profitable