I guess someone right after the Great War / the war to end all wars could be forgiven for thinking people wouldn’t be trying that again anytime soon.
What I would consider different this time is that I think the US is in the looting stages of collapse and will be unable to credibly fight such a war even if a minority wanted to.
I have a bit of a conspiracy theory about Trump starting the Iran war as a grift to get $200B appropriated only to abandon the region and have the money disappear.