I think the biggest thing the US is doing for Israel is discouraging regional actors from getting involved. If the US took no position here either way, the conf

I think the biggest thing the US is doing for Israel is discouraging regional actors from getting involved. If the US took no position here either way, the conflict would probably turn into a proxy war pretty quickly. Whether you think that's good or not depends on your viewpoint. I personally prefer that the states in the area, even if they don't necessarily directly represent the Palestinians, negotiate the conflict because they have to deal with the fallout on their own borders/politics. Being able to purchase weapons from the US also gives them significant political latitude internally. When a significant amount of your economy and government spending goes to making weapons, you're going to affect domestic budgets, which will make coalition building much harder especially in a country with as many small parties as Israel. We see this in Russia as well but because Russia is not democratic when it comes to defense allocation, it simply throws its dissidents in jail or encourages them to leave.