And the crazy thing is the other country doesn't even have to behave well or keep up its end of the bargain to maintain top-level status.
As long as the US continues to gain more from its alliance with Israel than it loses, the alliance will endure. No matter how much individual leaders may loathe each other.
It's an empire-cock-blocking hate we have with Iran.
This also begs the question what is Iran's main problem with Israel then? Israel wasn't involved in operation Ajax. Why is it the little Satan to America's great Satan?
Given their conduct in Syria, I find the "sympathy with the Palestinians" slightly hard to believe.