Jane Fonda's father was a very successful actor (Henry Fonda) and led a fairly protected life until she became a successful actress, herself. Jane Fonda, even by her own admission, tended to adopt whatever ideals the current man in her life held. That certainly shows a serious personality problem, but one that actually has little to do with the morality of war or soldiers.
wasteofo2 hit on the reason some people hate the military. I think that kind of thinking is a little misguided - a little like hating police because you got a speeding ticket. Particularly ironic is the number of those people who don't vote because the entire democratic institution is corrupt, including the elections.