The Kuwaiti government was willing to release him provided he had a ticket for a direct flight to the US. His family provided it and he was taken to the airport where he was denied boarding with no reasons given, presumably because the government has put him on a no-fly list. If you leave the US, they put you on the list so you cannot return. Since the list is secret, you do not know why you were put on it and how to get off it.
Gulet Mohammed is a Muslim so the government assumes that no one will make a fuss. For others, they use different methods, such as harassing you at the port of entry with lengthy questioning and taking away your computer and any electronic devices each and every time you return, as is happening to WikiLeaks supporter Jacob Appelbaum
This is what the US government under that great Democratic constitutional scholar Barack Obama does to people it does not like.
Glenn Greenwald is holding a fundraiser to enable him to continue his work. As readers would know from the many, many times I link to him and quote him, I consider him to be one of the most important political commentators and defender of civil liberties in the US right now. If I had to identify one blogger whom I consider to be essential, it is Greenwald.
You can see that he is very uncomfortable asking for this support. Please support him if you can.