Yea, the US joined in in 2025, what should it imply about a future war? The assumption that Iran doesn't know who's bombing it sounds rather dubious. If anything, it should be very much in their interest to assume away US involvement unless 100% proven, given fighting an additional enemy tend to be very bad and US is so powerful. Unless...

Maybe the strategic balance creates a situation where it's advantageous for Iran to pull US in regardless of non-involvement. They don't do well against Israel alone (see rather low damage of 4 separate large scale attempts at attacking Israel directly), but US is so much easier to pressure via the Gulf. Indeed, this scenario doesn't quite need Israel.

So US risked getting pulled in not due to attacking in June 2025, but because the cheque given to the Gulf was starting to expire, the power balance was objectively swinging in favor of Iran at the location where Devereaux sees as the most important part of the Middle East. Now, say there are powerful states who feel they are in a decent position now but also that the strategic balance would slip away. What do they tend to do? Devereaux can consult his WW1 history.