Israel is not the 51st state. It is not the second head of the snake. It is a colony that has heavily invested in the politics of its sponsor empire to ensure its own safety. Basic master/slave dialectic.
What Israel has been doing for the past two years is absolutely not in the US's interests. Its been an international diplomatic disaster and a gigantic waste of resources and capital. What's happened is the US collectively forgot it's really the master in this relationship.