Your broader point is true but the characterization of Israel as an extension of America is not.

Israel is happy to be the sacrificial anode for more or less anyone willing to pay and not immediately counter to Israel's own geopolitical interests. This is a service they offer to the world, not just America.

America simply happens to be the largest customer among many.

> This is a service they offer to the world, not just America.

It's a service that they offer first and foremost to themselves and against anyone else, including America.