The founding fathers didn't ever envision immigration being stymied. And for good reason.
(IMO) These anti-immigration attitudes are symptomatic of the protectionist nature and another symptom of BIG government. I think illegals contribute far more then they take away from society and boost our economy.
Let people come here and create wealth. We are the light that lights the world.
(easy on the flaming...:))
Just remember that the next time you pay a large rent for a small apartment, too much for too little of a house and your property taxes. The housing problems in the USA , shortage and cost, are in no small part, being driven by excessive immigration.
I can just imagine a young Tesla trying to immigrate here today.. the professional associations and protectionists would try to stop him.