Saudi Arabia has been at war with Israel and the West since Israel's founding. Saudi Arabia is the location of Mecca, and as such the Saudis Royals have been forced by the Sunni Wahhāb ʿulamāʾ (religious scholars to lead the muslim world's effort to destroying Israel. The prospect for peace between the two is only possible because the Sunni muslims hate the Shiite muslims of even more than Jews and Iran is about to become a nuclear power.
"The enemy of my enemy is my friend."
And yet, they don't fight each other. Both are considered U.S. allies. I think they trade and often cooperate. So it's not even a Cold War. More like an Ice War. Or a Phony War.