The man lied to Congress and committed an act of naked treason to serve as a propagandist for the enemy (he even now admits that his claims of war crimes observed and participated in were the exaggerations of an impassioned youthful John Kerry).
Remember the story about JFnK attending a VVAW meeting where they discussed killing U.S. Senators.
http://www.tonyrogers.com/news/kerry_vvaw_assassination.htm