It's as bogus as it can be. But our "press corps" just keeps repeating it over and over. This time is from Probing a Bloodbath by Evan Thomas and Scott Johnson Newsweek 06/12/06 edition (accessed 06/05/06):
In Vietnam, when the doleful news came home of burned villages and slaughtered civilians, many Americans blamed the military. Vets came home to be spat upon and called "baby killers."