For many years Iran was enriching uranium and various other countries were like, no pls.

This is a massive oversimplification but basically back in 2014-15 Iran agreed to stop trying to build nuclear weapons capabilities (and have increased surveillance of what it was doing) in exchange for lifted sanctions.

Trump of course undid all that, Biden tried to reinstate it, Trump seems to prefer to let Israel bomb Iran instead.

So in my view what has just been proven here (and in Ukraine) is if you trust the US and don’t arm, you will get attacked by your enemies.