I was wondering the same thing. I knew Kerry was an arrogant SOB but I am really getting all fired up after watching this. He seemed to want to lump all Vietnam vets in the same category of baby killer, etc. What a bastard! And I can't believe that there are some vets backing him.
Found this:
http://www.boston.com/globe/nation/packages/kerry/061703.shtml With antiwar role, high visibility
By Michael Kranish, Globe Staff, 6/17/2003
...excerpt
O'Neill for years has declined to talk about the experience, partly because he says he became disillusioned with politics and government after the fall of Saigon in 1975.
But in a telephone interview from Texas, where he is a trial attorney, O'Neill made it clear he still harbors resentment at the way Kerry accused veterans of atrocities.
"The primary reason I got involved was I thought the charges of war crimes were irresponsible and wrong," O'Neill said. "I thought they did a real disservice to all the people that were there. I thought they were immoral."
The bitterness remains. Asked whether he agrees with the view of some observers that Kerry was forever altered by the war, O'Neill responded: "The war didn't change [Kerry]. I think he was a guy driven tremendously by ambition. I think he was that way before he went and is that way today."
Unfortunately I don't. Maybe google would help.