Iraq was much more popular in 2003 [1] than the current war in Iran is [2].

[1] "In the months leading up to the war, majorities of between 55% and 68% said they favored taking military action to end Hussein’s rule in Iraq. No more than about a third opposed military action."

https://www.pewresearch.org/politics/2023/03/14/a-look-back-...

[2] "Some 27% of respondents said they approved of the strikes, which were conducted alongside Israeli attacks on Iran, while 43% disapproved and 29% were not sure"

https://www.reuters.com/world/us/just-one-four-americans-sup...