At least that way everyone would know where they stand. Arab countries would know that the US doesn't care about them, only about Israel, so they wouldn't be constantly disappointed by American actions. And the US wouldn't have to act surprised every time it finds out that nobody in the Middle East, not even Israel really, likes it.
Police disperse hundreds in brawl in Kafr Manda, northern Israel (Haaretz)
from the article: U.S.: Iran's actions compromise Lebanon's sovereignty