And what about people who say they are coming as tourists, students, on business, and the like? How do you prevent Muslims from sneaking through that way? Or would you cut off all foreign entry into the U.S. period as the only way to prevent Muslims from entering?
What about them? Who cares if they stay home? We should not be educating our enemies in the first place and business does not require travel as Amazon proves. Education does not require presence either as far as that goes.
No country can survive the erasure of their borders.