Without Mubarak there is no Israeli attack on Iran. His replacement will be concerned about the rage of the masses, if they see him as a collaborator in such operation.
Whoever is opposed to a strike, or fear its consequences – even though they appear to be in favor, like Netanyahu and Defense Minister Ehud Barak – now have the ultimate excuse. We wanted to strike Iran, they will write in their memoirs but we could not because of the revolution in Egypt. Like Ehud Olmert says that he nearly made peace, they will say that they nearly made war. In his departure Mubarak prevented a preemptive Israeli war. This appears to have been his last contribution to regional stability.