Another day, another left-winger insulting our intelligence.
No, actually it didn't. It was a carefully crafted image and it successfully communicated precisely what it was intended to communicate - that a sizable portion of influential young Americans not only did not support the troops but actively opposed them to the extent of being willing to shoot at them. The only difference is that Fonda thought the gesture heroic and popular at the time and has since come to the realization that it no longer is.
That sort of treason, however, came with remarkably little penalty. Our sitting Secretary of State founded his political career on it. Fonda now feels badly about it - apparently, although it is difficult to determine from her words how badly or why - but Kerry has never, to my knowledge, even once expressed regret for the slander he rode to office.