This reminds of the song U.S.A by Dubioza Kolektiv. So many people out here are trying to get into the States, they see that American Dream 'freedom' branding and go 'yeah, that's what I want' then they realise everywhere has its problems. I'm sure that immigrants who complain are told to 'go back' if they don't like.
It's pretty difficult for immigrants to get into the US legally, but some Americans speak like it's so easy to just up and leave your country on a whim 'if you don't like it, leave'.. Maybe it is easier if you have an American passport.