[MichaelCorleone]

A heavy price will be paid by all for Israel holding back.

[17th Miss Regt]

In 2010, the Israeli leadership wanted an attack but the military said it did not have "operational capability,"

They would have to burn a hole through Iranian air defenses to get the aircraft in there to deliver the ordnance. But first they would have to fight their way through American assets defending Iran against the airstrikes (as ordered by Obama). They figured that fighting America was too big a hurdle for now.

[arthurus]

concerns about its ally the United States

The US has apparently obliquely threatened to interpose the US Navy between the IAF and Iran i.e. shoot down IAF planes.