There is absolutely no way Obama will risk his reelection by getting into another shooting war this time with a well armed opponent in the narrow confines of the Persian Gulf. In case Netanyahu failed to get that message, Obama will shortly withdraw most elements of the 5th fleet. Israel is on its own and simply does not have the punch to do the job. Leadership always matters. Obama values a second term much more than a nuclear defanged Iran.
It depends.
Israel could lift Iran and its bunkers off the planet. I always ask what would the opponent do? Here? Its very clear. Once the barbarians have a nuclear weapon, they WILL use it on Israel. They make NO bones about it. Then its Europe and America. Worst part is they already have their man in our office.
The Israel has to worry about Iranian allies, client states and proxies.
Israel has but one shot at this.
Obama has no choice but to back up Netanyahu.
The US is already moving assets out of the Pacific and over to the Middle East in anticipation of a conflict.