My shortcomings in Saudi Arabian history knowledge notwithstanding,When you throw Saudi Arabia into the mix, I know that you are utterly unaware of their history for the past 70 years.
Iran wants a foothold on the Arabian peninsula and have dogged KSA relentlessly since 1979. KSA has NO ambitions in Iran.
their advocating our militarily attacking Iran is heinous.
Tell me....how does in your view does this history justify
a preemptive attack, & starting a war with Iran?
Here's an idea....
Let's attack Saudi Arabia, & then give it to Iran.
We'd eliminate one unsavory ally, & convert an enemy into a friend.