Maybe he believes he can present a more balanced point of view. I think we should wait and see. Marines don't generally turn against their own country.
I just read an article on Rushing from a usually barfy left-wing site (link below) that seems to be somewhat reasonable in its portrayal of Rushing. There's no indication that Rushing is specifically "anti-U.S." or "anti-military" or even anti-Iraq War, but he appears to have struck up some sort of friendship with one of the Al Jazeera staff and has decided to present a different point of view on Al Jazeera. We'll wait and see.
http://www.commondreams.org/headlines04/0802-03.htm
Well we had that Chld Molester working for the UN Weapons teams what was his name? I mean other than pervert and traitor (the names that could be spoke in polite company).
Generally, no. But I do remember one in particular named Scott Ritter.
"Marines don't turn against their country"
Two words, Scott Ritter.