For people wondering why no other Middle East country hasn't jumped in is simple. It's the same reason why no western country has jumped in to help Ukraine.
If Iran attacks Israel, the US would jump in and thus NATO jumps in.
And Israel has American made nuclear weapons. This country has created over the past 50 years a cac ally who hates arabs right in the middle of the arab world. And they've attached themselves to them economically and militarily.
The US is the only country that can really end this for good, but they wont. And this country can afford to take the hit because we are all connected economically on a global scale.
Economic Globalization gives the US leverage over everyone. Israel is a pawn trying to act like a Queen.