If you really think anyone in the Bush administration -- or anyone in the Beltway GOP, for that matter -- would have "taken on the Saudis," then you're delusional. The U.S. military has been functioning as an armed mercenary group for the Saudi royal family for decades.
Well, there was a time when everyone in FR supported Bush, and thought he was fighting for our country. There was even a time, during his first term in office, when he was thought to be conservative.
It did make a kind of sense to take on Iraq first before tackling the Saudis. Secure the oil first. But, as you say, that was evidently never Bush’s real intention.
I was also hoping that if we conquered Arabia, we could split the country in two: One country with the oil, the other with the Holy Cities. Leaving one of the richest countries in the world also basically in charge of Islam is not healthy for the rest of us.
But Bush proved to be a disappointment, as you say.