Keeping the spirit of controversy going here ( global warming ), I would like to ask - Was the Vietnam War wrong or was the US subject to perhaps the most successful leftist propaganda campaign in history. A campaign so successful that any dissent from the given line is even now veered from with trepedation and appears to have entered the Western psyche as some accepted group mind thought that can not be questioned?

I mean at core is there any real difference in the US defending Iraq/Kobane from an army which wants to impose its totalitarian views today, and defending South Vietnam from a North which also wished to impose its own brand of totalitarian ideology back then?

What I'm not necessarily saying is that the Vietnam War was absolutely right. What I am saying is that in the context of the times it certainly wasn't absolutely wrong. And if you are interested in liberty and democracy, the attempt to defend the South was a political decision which made sense in the context of those times.