The United States has it's own propaganda, but it's very effective because people don't realize that it's propaganda. And it's subtle, but it's actually a much stronger propaganda machine than the Nazis had but it's funded in a different way.
Nonviolent action does not have to get others to be nice. It can in effect force them to consult their consciences.
So people ought to be free to leave here, but there ought to be opportunity for them to come home.