Exhaust every option to prevent Iran from going through with developing nukes. Diplomatic, sanctions etc.
If those fail, my point is that Israel may act unilaterally.
No question about it. It's serious and you are correct about Israel...but have you noticed that ,with our support,they have conceded many times to the pressures and atrocities committed against them?
Much of this has to do with powerful diplomatic and economic pressure being applied by the combined free world and it's not all that public or available to the public for many obvious reasons of security and privacy.
Palestine right this moment is facing the loss of monumental funding from Israel if the current threat levels are not ceased soon. Plus they face similar devastating financial support withholding from us as well.
While it all is of considerable interest to average citizens, don't for a moment believe that they ( you or me) have any influence in any part of all of this.
Thus pissing and moaning about "who shot John" is a collossal waste of time and personal effort. and putting in your "2-cents" about Bombing one or the other is "peeing up the rope".
Are you getting any of this?
You'd be far better off getting on your knees and praying to God for his Grace to be shed on all the various participants and for world peace for all.