No, they wouldn't. The US could wipe out countries all over the globe if they wanted to, but that doesn't mean their going to do it. There's a lot of factors that go into deciding something like that. The US has the weaponry to go into Iran undetected and take out their nuclear facilities and leave without ever being spotted. Matter of fact, right now the US has 6 B21 bombers loaded with bunker buster bombs sitting outside of Iran right now just in case the nuclear negotiations do not go as planned, although I suspect they will since Iran has lost so much power lately. One reason we don't just go in and start bombing though is because we don't have issue with the Iranian people. It's just their leadership. Another reason, just like with Putin in Russia, if we were to take their leadership out, we don't know who will replace them and we don't want another situation like Syria or Libya.

The US also has bigger fish to fry. Iran is nowhere near the biggest threat to the US, so for now, the smarter move is to negotiate with them and keep the financial pressure on them which should be enough for now.