We have been the "world's policemen" for decades since WWII, in part because of our newly-found position as the global super-rich society (comparatively-speaking). It has been in our best interest to make sure that regional changes are slow, measured, and as small-scale as possible. The slower things change, the longer we stay at the top.
The Saudi ruling family is enjoying the fruits of stealing the assets and equipment of American and British oil companies several decades ago, and have been living lives of startling wealth and power ever since. They don't want that to change, and so they will do whatever it takes to try to ensure that no group or nation in their region goes about making big and fast changes... changes which could mean their ouster from their amazingly easy and fabulous lifestyles. Right now, given the previous few years with Obama enabling the worst Islamic elements, their job is getting more and more difficult. Siding with the Israelis is their best bet to ensure that big changes don't happen too quickly.
I think whoever builds something has the right to blow it up when it is stolen be it oil rigs, MRAPS, or rifles.