That is, without question, the dumbest thing I have ever heard. Hitler spelled out his whole like that he thought the Germans needed lebensraum in the east.
It is true, Hitler didn't want war with France and GB, but only because he didn't want to fight a two front war. Maybe at the time he thought he'd be happy never fighting France and GB, but, could France and GB possibly have taken that chance?
There is no significant oil in the conquests of the Third Reich except in Romania, which was an ally (and in the North Sea, which hadn’t been discovered yet). The blitzkreig was running out of gas. Hitler preferred the idea of making for the Caucusus to the idea of attempting to get to Iraq.