Most Americans supported the invasions, then the nation building sucked and they changed their minds.
Can’t find many of those original supporters anymore. They’ve all changed their stripes.
Nation building can only be done if you control all aspects of the conquered society. And I mean All!
We were unwilling to do that there so we were left with “half-assing” it. And got the completely preictable results.
Note in both cases “nation buliding” at any level was a fools errand! In both cases we should have left after leaving the place in ruins as punishing for messing with Uncle Sam or not gone in at all!