If you read the article, he's a 9/11 "Truther."
... and that is relevant to the fact that the US government is denynig him the right to travel because?...
And if you read the rest of the article:
Hicks was puzzled as well, as he has no criminal record or outstanding warrants. He explained that he is a former Department of Defense (DoD) contractor who has also passed extensive background checks to receive an enhanced concealed carry license. In addition, he holds a Transportation Workers Identification Credential (TWIC), a security card issued by the TSA for transportation personnel. However, none of these factors allowed him to get back on his flight, or take another flight home.
You'll also find that his wife is a US Navy lieutenant, stationed in Japan. He was enroute to visit her when he was escorted off the plane in Hawaii.
I may not agree with his politics, but this is ridiculous. The TSA won't tell him why he is on the no-fly list. If it is indeed because he has simply expressed opposition to government actions or government legislation, then almost everyone here on Free Republic had better hope JimRob doesn't get served with a National Security Letter demanding any information he has about the identity of posters.