Why is the USA attacking Iran?

Here's the process as I understand it (please correct my errors):

1. USA likes Israel, a lot for some reason
2. "Israel" attacks Iran. This whole thing is being done with the USA's airplanes though.

• Why does the USA love Israel so much?
• What's the logic here? Not just the conspiracy. But why now? Why at all? Is Israel gaining something that I'm not seeing? Destabilization the main goal? What's the USA gaining here?