The best Fonda has done to explain her actions during the Vietnam war were the equally lame excuses that she was against the war and that she didn’t intend to aid the enemy.
This was true of a lot of clueless liberals of that era, however Fonda sure went to a whole lot more trouble than most of them to be a gratuitous pain to the USA and a help to those who participated willingly in wishing a ruinous communist political system on the Vietnamese people. Kennedy administration bumbling didn’t help either in what might have been otherwise kept a cold war, but we’re talking about Fonda not Kennedy.