This seems like some serious rose colored outlook. Support for Israel in their patron state has absolutely plummeted in the last year. Support is almost certain to be cut back sharply by the next administration and might go to zero in the near future.
Iran's nuclear program has hardly been destroyed long term and there is almost no chance a durable nuclear agreement comes out of this war. It will almost certainly be a vague memorandum where Iran pinky swears to never build a nuke and then starts building one as soon as the fighting stops. America isn't going to start endless wars to prevent that and Israel can't do it alone. The long term future looks grim for the Middle East, especially for Israel.
I wish I could share your optimism, but the fact of the matter is that American politicians are beholden to their sponsors on both sides of the aisle, and the military industrial complex and American imperialism which Israel is a part of, are both popular initiatives among their primary funding sources.
Meanwhile, most of the voter base (perhaps understandably) cares more about domestic issues than they do about the plight of people on the other side of the world who they are killing and exploiting with their tax dollars.
Given all this, I don't know how you can be so certain that anything will change with a new administration, even with polling demonstrating that voters do disapprove of support for Israel now. Most of the people who disapprove of funding Israel don't care about it strongly enough for it to be a significant factor in their engagement with electoral politics (which for most people is also just limited to voting once every 2 to 4 years)
Iran's nuclear program has hardly been destroyed long term and there is almost no chance a durable nuclear agreement comes out of this war. It will almost certainly be a vague memorandum where Iran pinky swears to never build a nuke and then starts building one as soon as the fighting stops. America isn't going to start endless wars to prevent that and Israel can't do it alone. The long term future looks grim for the Middle East, especially for Israel.