“Why can’t we get people from Norway, Sweden, Denmark?”

Dude is not a good person.
The grand irony is that people from those places don't even want to come to America.
Why the hell would somebody want to leave a functioning healthcare system , free education, good infrastructure, a proper safety net, etc. for the privilege of being in a mass shooting in Dallas? All three of those places have a better quality of life than we do.
At best, we are just a pit stop for people to do their studying and go home.
Also Trump is going to learn the hard way when he realizes that the healthcare system, the education system, and the research system is propped up by third worlders from the Philippines, india, nigeria, china , brazil, etc. I mean for God's sake the richest man in the world is technically a third world immigrant that started his journey as an illegal.