Why would they? Iran has been fairly harmless for decades, and the downsides of starting a war with Iran are pretty obvious. What's next, starting a war with Egypt or Panama, just for funsies?

Pre-Trump, some European countries might've let themselves be dragged into another one of America's pointless unwinnable no-reason wars. But with America itself all but declaring war on its European "allies"? Not a chance. Unless Iran starts sending rockets to Europe (and why would they?), they'll just stay out of it and let America clean up its own mess.

If anything, the Ukraine situation has made Europe more pro-war, with countries significantly increasing their defense budgets. If Iran had been a "post-9/11 Afghanistan invasion" scenario under another President, 2026 Europe would happily jump in to help.

europe understood the same thing all the previous presidents have - that war with iran would massively disrupt energy and thus the global economy.

europe wanted to keep the jcpoa after the US left it

No, they wouldn't. Trump has treated Europe shamefully and built a tremendous amount of ill will.

Better to spend those resources decarbonizing to avoid the need for the Middle East. Long-term energy security over never-ending conflicts.

Trump also didn't go around trying to drum up support for Iran. His attitude going into the war was "I won't let anyone butt in to steal credit for my impending glorious victory." It only turned into "how dare our allies abandon us!" once it turned into a quagmire/loss, at which point it would have been a tough sell under better circumstances.

I still agree that everyone is pulling away and for good reasons, prominent among which is being pushed/shoved, but I also can't stand to see Trump's victim narrative gain traction when he chose to go it alone for the dumbest possible reason.