You mean like bombing a school and killing about 150 schoolgirls?
The USA had a lot of local support and goodwill in Afghanistan, and turned it into support for the Taliban, because they kept killing civilians in their attempts to beat the Taliban with bombs, because they wanted to limit the unpopular ground troop deloyments. The chance that the same will happen in Iran is precisely 100%
Even Hamas knows western powers don’t do this on purpose - which is why they take up arms inside of civilian facilities. The Iranian people know the US doesn’t intentionally kill little girls.
Meanwhile the Iranian government quite literally has killed upwards of 30,000 people (maybe some were little girls even) and is hanging people in the public square for protesting.
Not to mention Iran intentionally targeting apartment complexes and other civilian targets throughout the region. Why are we even talking about the US accidentally blowing up a school? We should be talking about Iran and their revolting crimes instead.
You can't say for sure that you wouldn't wilfully join up if you were in that kind of information environment.
If the Fox news watching Americans can be broadly supportive of this war, you'd best believe that there's an equally large contingent of Iranians who feel an equal and opposite antipathy towards the US.