Politics makes for strange bedfellows.

The head of the House of Saud, the King, and much of the military believe that military integration, weapons sales, and mutual defense scenarios from the Americans will benefit Saudi Arabia.

Saudi Arabia also has about ten trillion in oil reserves, and the United States needs oil.

Historically, Saudi Arabia was just the slice of the former Ottoman Empire the British and French let us rule. Hence Saudi Aramco's original name: "The Saudi-American Oil Company."

Lucky for us that Saudi Arabia turned out to have such large oil reserves. Of course, the area is also at a strategic naval point, both of which explain the number of United States' military bases in the region.

So some of the populace sees the Muslim world as being subjegated in their Holy Land, and some percentage of them are fans of violence and meyhem.

An analogous situation would be how rich Irish-Americans funded the IRA for decades, despite an official United States' government stance that they were a terrorist group.

OK, I'm getting the picture that the higher up the leadership you look, the less likely they are to want to act against the US. Thanks.