I think without US Israel has a real chance of losing this. This would have major ramifications for US. (In my mind they’re great in the long term but uncomfortable in the short term). So as long as the conflict doesn’t stop, I think US has no choice but to join. That too has many ramifications domestically and globally and risks major internal turmoil at the very least.
That’s probably why all the posturing on twitter - they want to intimidate Iran into stopping so the US isn’t forced to join and deal with the fallout (no pun intended).
Of course the military industrial complex would love nothing more than another war with US involved, but the potential consequences give them some pause right now. They really need to know what Russia and/or China intend to do - the extent of assistance they will give Iran. Not to mention Iran may also be nuclear which is a huge risky possibility.
China has many strategic interests with Iran - from oil, to the land corridor to Europe, and other stuff. I think China has incentive to protect those interests, but is it worth the trouble? Iran also has other supporters that are not fans of Israel/US as well.
So for US it’s a damned if you do, damned if you don’t. If Israel loses US loses global hegemony. If US intervenes but Russia and China step in, US may no longer be up to the task of dealing with them like it could 20-30 years ago. Times have changed. It may still lose.
So there’s a real risk that US - regardless of its participation - loses the unipolar hegemon status, the petrodollar, and who knows what else. Its best bet is to convince Iran to just stop the whole thing, so they’ve been running around like chickens with their heads cut off going between threatening Iran, to saying they have nothing to do with this, to saying they had everything to do with this. It’s like throwing shit at a wall to see what sticks.
So I’m pretty sure Iran has everyone sweating right now. Will they continue? Will they escalate? Will Israel? This is not Iraq or Afghanistan or Libya or Syria. The only way this comes out “ok” is if everyone just calms down. And by ok I mean status quo continues. Which of course is anything but ok.
Part of me wants cooler heads to prevail. Part of me wants to finally get this show going and for Israel and US to learn their proper place in the world. I know this won’t happen without kicking and screaming and a lot of death and destruction, but it may still be worth it if it avoids the inevitable “finer order of control” they’re leading us into.