I did read McKibben's piece but it wasn't something that was unknown but the paper trail proof wasn't forthcoming. Observers of the industry have long been aware but documentation is something else. Ever since the first OPEC crisis under Carter, what was obvious to the insider became known to the 'customer'.
I don't think Exxon et al want to kill the world, they just don't want to stop raking in all that money. They like our leaders rationalize (denial) and then justify (it isn't nearly that bad yet) and then fantasize (it won't get that bad later) and finally they amoralize (that is when they admit that they just want the money now and hope somebody will fix everything later - very close to not giving a damn but not quite that far).
The Saudis take all that one step further. They would kill much of the world just so that they remain super rich because they are ordained by fate to be rich and if they can't be rich then screw everybody.
Our shame is to support their fascistic behavior, their suppression of freedom, their oppression of foreign workers, their destruction of the environment, their oppression of women, their mediaeval punishments (like somehow whipping is permissible and beheading children, cutting off hands and executing people who only need a freaking divorce or to get a room somewhere) too.
The Saudis are royals because WE permit them to get away with it. Watch Lawrence of Arabia and see just how royal they are. Tribal chiefdoms enthroned by the British for the sake of oil. The British in the Middle East has been the cause of a century's worth of trouble all we have done is replace them.