And nearly half of the US supports this.
What exactly was ruined for the next generation of Iranians, by taking out that 87 year old man?
This does not accurately describe the picture.
When the US went to Iraq the approval rating was in the 90s(correction I mixed up Iraq and Afghanistan, Iraq was 70-80s) because the US had been attacked, and Bush took the time to sell the war to the Americans (with lies) by the time all the disasters kept coming in, support dropped to the 40s.
This war started in the 40s approval rating. If bodies start coming home in mass, I don't know how things will turn out for Trump and his party but its already looking like a disaster for them and it hasn't even hit the really ugly part yet.
American foreign policy in a nutshell
Personally I find it strange that with all the vocal detestation of "Nazis" so many people aren't in favor of intervening when an undeniably fascist regime commits the largest mass murder since the early days of the Holocaust and has no plans to stop the killing.
But if it was a country without oil it would have been no more than a byline in the media, as if it were Sierra Leone or something, let's be honest.
The problem is you can't paint it as "good guy" and "bad guy"
You're right, no one pays attention to Sierra Leone, or Sudan, or Myanmar. And no one here or in the media would care that some country was fighting a war with the Iranian regime either, as long as the country country fighting it wasn't populated by Jews.