One had to do with the idea that because people had been lost in the war, it would be necessary to fight until the psychological arithmetic involved in the loss could be justified emotionally by "victory" or at least "pay back." I have heard that one several times in the last couple of days from dizzy blondes on 24/7.
A second argument was made in those days concerning personal investment and profit involving; the careers people had made related to SE Asia, the loot collected by "Alaska Barge and Transport" or "Foremost Dairies," etc. One was asked, "surely you do not believe that those so "invested" will ever allow the war to end? Surely. That argument has returned as well.
Then, there were the Democrats of the left. Post Cronkhite, they wanted nothing so much as an immediate end, in all ways to American participation in the war. Out! Out now! The devil take the hindmost. In 1975 they got their way by enacting their wish into law. The devil DID take the hindmost. If you don't think so ask the Vietnamese diaspora. Ask them. Now the Democratic Left is unhappy because President Obama has decided that we will leave Iraq in a prudent way.
Well, that war DID end and so will this one, the only question is "How?" pl