On another note, this whole thing is really making it feel like Iran could have ended all this a long time ago by responding this way the first time around.
Important to remember that this is Operation True Promise 3. We are in a much different position from the previous two because Israel has had a pretty good winning streak of weakening the axis of resistance. During previous rounds of Israeli violence Hezbollah was a real threat and Syria was an area the resistance could operate in on Israel's border. Israel has been getting what they wanted and their hubris (and the material conditions) brought them here to where they thought they could get away with direct attacks and escalate to this point.
It's supposed to be a policy of controlled chaos in the middle east, and an actual direct war between Israel and Iran probably isn't what they had in mind. I don't really know where the US wants to go from here, but I doubt direct military intervention from the US could last too long before they get a black eye.