No boots on the ground... yet. We don't know how Iran reacts next. To their leadership, this is a pretty serious existential threat.

Trump signaled that diplomacy wasn't going to solve the tension, and they weren't getting what they wanted to in exchange for not building weapons. Of course they were going to build them. Why would they not, whether for offense or defense?

It didn't work in Iraq. Why would it work here?

I am blaming Trump. He did this. He withdrew from the treaty which led directly to this action today.

Horrible, and illegal, but Congress has repeatedly refused to do their constitutional duty.