Some media and people are calling some of Donald Trump's immigration comments radical or nutty. BUT, here are two Google searches dealing with alien immigration to the USA, that seem to indicate otherwise, in some respects.
The first Google Search shows Obama's ambition to excuse illegal immigration.
The second search shows that U.S. Law: 8 U.S. Code 1182 (put on the books in 1952!) already provides sufficient legislation to address how to handle illegal and undesirable immigration, including how former presidents have used the law to weed out aliens who were esteemed to be a threat to the USA and who needed to be deported.
Granted, some nasty, fearful, and bigoted things have been done in the past, such as the way FDR treated many Japanese-American citizens during WWII, but past failures are no excuse for letting the pendulum swing to the opposite extreme in which we blindly allow insufficiently vetted people, like THE lady murderer in the recent San Bernadino massacre, to enter this country, thus permitting her to engage in her destructive mission. We need to utterly reject the la-di-da Obama notions of immigration and sternly embrace what is best for the USA. We need to support and defend our God-given Constitution, which means that everyone in the USA needs to wake up and admit that not everyone who comes to this country has the USA's best, godly, or constitutional interests at heart. Yes, Virginia, there really are people who have come to the USA who should NOT be living in the USA.