It gives us a regional coalition partner. That's never a bad thing, regardless of circumstances.
For what it's worth, I think the American activists on this issue bungled the messaging to disastrous effect (in the same way we bungled criminal-justice reform). It's a saturated issue with low political salience outside a specific (and increasingly constrained) demographic.
A win in Iran will be a short-term boost, in America and in Israel. Then we'll go back to being pissed about rising prices.
Israel chose to trade popularity for having real geopolitical gains on the ground. Popularity could be won back later, but removing the Iranian ring of fire around it is a real and tangible achievement that would last decades and change the Middle East.
It remains to be seen what impact this will have, but it will certainly impact the ability for everyone to claim that criticism of Israel and sympathy for Palestinians is motivated by antisemitism.
The democrats lost the last election in part because of their stance on Israel.
With a bit of luck this could lead to a shift in policy within a generation.
You missed the point. The fact that it requires two of them to gang up on Iran says something about how capable Iran is in defending itself.
There was a study showing almost every revolution happened not because of ideology but over the price of bread.