@FOJN
We should know by now that nothing good happens to ordinary citizens when the US gets involved in the politics of other nations.
It’s not that simple.
Germany, France, Poland (etc), Japan, South Korea, Bosnia, Kosovo, Kuwait?
You have cherry-picked your list, but even the failure cases aren’t all clear-cut.
Iraq life expectancy is five years longer and GDP is 10x higher than under Saddam and a sizeable minority (especially older people, ie those who remember) see the invasion favourably, including most Kurds.
Syria is a weird one to pick: life under Assad was a hell of a lot worse than ‘not great’, the new regime was not US-installed (its roots are in Al Qaeda). And Assad’s butchery was actively supported by Iran (and Russia).
Intervention is morally and practically messy, and high risk.
But Iran’s regime is itself one of the biggest meddlers, actively funding terrorism and repression across the region.
If your argument against intervention is “it will make things worse”, you have a duty I think to recognise the many cases where it’s made things better, and ask instead: does Iran look more like the successes or the failures. I think that on several dimension it looks more like the successes.
(Still might not be a good idea, but your opposition seems to have started with the conclusion and then looked for confirming examples).