Copyright doesn't even make sense in this case.
The same would apply to an Australian who breaks a US law (and believe me, you have your fair share of wacky laws too, including some that are very similar to the law Mr. Evans is alleged to have breached) - if they attempt to visit the US in the future they are likely to be arrested at the border. Mr. Evans may have family in Australia (as referred to in what you have quoted above), but he himself is not Australian. So the whole "he cannot return to his homeland" thing doesn't really apply.
Having said that I agree with the main anti-censorship sentiment of your post