CS, So you are admitting that the similarity is close, How similar does it have to be?
(1) Gear - It would be ludicrous to expect equipment to be the same 30 years later. The new gear is not making that much difference against the insurgents anyway, as it is designed for set piece warfare. It worked very well at the outset when the fighting was unit for unit, but is now almost useless in the hit and run street battles where the insurgents pick the time, place and target.
(2) Doctrine is different, yes but only insofar as, one was Communist the other is based on muslim precepts. Both of them, virtual dictatorships. In that respect they are quite similar.
(3) Moral, I really don't see what you're getting at. There is no moral involved.
(3a) If you meant "morale", that is also amazingly similar, at the start we were going to "kick arse", but when it all reverted to guerilla warfare and the troops were frustrated by their inability to utilise their superior weaponry and technology to it's best advantage "it all went to hell in a hatbox". That was when we started getting people deserting their units and refusing to be posted,... that is starting now, there was a case mentioned on this site several days ago and he wasn't the first.
(4) Attitude - Ours, the same, in Vietnam we thought we could save a country from Communist oppression. In Iraq we are trying to install a democracy. Their attitude - they said they are not interested and that we were interfering in other's business. Virtually no differences there.
There is one major dissimilarity, as yet we don't have the big moratorium marches and civil disobedience at home that was a hallmark of the latter part of the Vietnam period. This is in part because there is not the huge covering of the war by the free press as there was in Vietnam, non embedded journalists are given little access to information. The reason for this being that our governments remember how the free press swayed the people in the last conflict, Vietnam. This is also one of the reasons why they are cracking down on the controversial home videos being sent home by the troops. As for public marches and "Bring home the troops" rallies, that will come as the body count grows, as it did in Vietnam.
I feel that your reasoning is not based so much on fact, as "desire".
"Patriotism" is a noble cause, but it is foolish to let it blind you to the truth.
I too, wish for nothing more than for the coalition to succeed. Unfortunately I see us falling into the same traps as last time and it doesn't inspire me with any confidence for the future.
Someone once said, "Those who refuse to learn from history, will be forced to relive it". Don't look now, but....