Sources are conflicted as to whether it happened. However that she publicly stated the POWs should have been tried as war criminals and shot was true. She also called the prisoners liars when they stated what conditions were like. The other things she did on that trip qualified as traitorous acts and she should have been in prison instead of voted one of the 100 greatest women of all time.
No arguments from me. I think she should have been hanged.
Of all the accounts of the POW meeting, not one I can find is first hand. Of all the books I've read written by former residents of the Hanoi Hilton, none referenced such an event. Of the seven (I believe that number is correct) POWs she met with, not one has mentioned this happening. Maybe it happened and no one is talking. Maybe the media covered it up by refusing to write/air their stories. I just don't know.
I do know fabricating and helping spread BS stories for an agenda is a favored tactic of the left. There is very recent evidence of that happening. I do not wish to be associated with them of their methods.