Ahh, I see you are making fun of the people that actually think that way. My mistake.
Well it's more like sitting in a lifeboat from the sinking Titanic and asking if it's too late to to stay in Ireland.
Anyway, to answer the question, I would be forced to favor the US/Israel. (And separately if Israel has indeed decided it will attack, the US has no choice but to do everything possible to get Iran to stop enrichment, even if the US itself believed Iran's enrichment were not problematic).
But the analogy with Iran vs. US/Israel war here is you drove your brother to the 7-11 and he comes out with a pistol and a bag of money. You're implicated, so you have no choice but to drive him as fast as you can to the border. Just because you're evading a 10-year jail sentence, doesn't mean you condone robbery (or in this case murder).
Poll
