“Why the hell has Trump not acted in accordance with this law. (ban or impose restrictions on aliens)”
That was the justification of the so-called “muslim ban” that the President enacted, and the courts enjoined. It went all the way to the Supreme Court, which upheld it in December of 2017. It remains in effect.
Bottom line is that the President and his Administration has done this, and taken many, many other related actions. It appears that you have a mis-impression of what has and has not been done.
I am in favor of our President. I also am frustrated by his complacency and the false premise that he has to wait on the communists to vote his way. He absolutely does NOT! I am hearing that at least we are working on 36 miles on new wall. We need 2000 miles of new wall going up rapidly. We need troops grabbing invaders and kicking them back out. No higher calling of the US military exists than to protect our borders from invasion of illegal aliens.What I see is “catch and release” of over 100,000 worthless parasite illiterate non English speaking illegal aliens PER MONTH and ZERO being done about it!