Old age does provide a certain perspective, even if us Old Farts don't have to go out and face bombs and bullets...
Harry Truman put the deal together to fight the North Koreans, in large part so that the South Koreans could be self-determinant.
JFK said (approximately), "Go anywhere, pay any price, to bring freedom and democracy."
SEATO got us into the Vietnam deal. We were obligated by that treaty to go in. How we did things once we were in is what the arguments have been about...
This country has been fortunate. We managed to fight the Cold War while creating a tremendously rich and hedonistic society. We've had gunznbutter beyond LBJ's wildest dreams.
We had Gulf War 1, mostly due to the uncertainty of Saddam's plans for further actions beyond his taking of Kuwait. Had he openly said he'd done all he wanted, and done some pull back from the Saudi border, GW 1 might well not have happened...But that's a "damfino" thing.
Regardless of the totality of Clinton's motivations, we got rid of Milosevic and his own version of genocide.
Then came 9/11. It's generally agreed that our Afghanistan venture was worthwhile and justified--and reasonably successful, overall, insofar as self-determination for the citizenry at large.
So with all that historical background for our motivations for fighting anybody, whether a Hitler or a Kim Il Sung or whomever, I can see why we went into Iraq. Saddam's a sleazoid, thieving, murdering, genocidal (bleep). We got rid of him.
The problem is the relativly small numbers of Saddamites, coupled with the nihilists of Al Qaida and its sympathizers. Those people aren't very intelligent. If they were, and only wanted us to leave, they'd simply quit shooting for a few months. Simple as that. Since what they really want is control over Iraq, and aren't very smart as to how to go about acquiring that power, they shoot. They don't want self-determination for the populace at large.
So, morally, we stay.
Art