I think, he is. But the tricky part is not the Crimea itself. Did you follow the link I supplied? They're talking about game which's not so trivial. In order to get Crimea, Russia's going to make Turkey forgetting about this peninsula in the Black Sea. How? By sponsoring the Kurds. Now, think what would war (or liberation?) in areas with Kurdish population would bring to the rest of the world? We're talking about Turkey, Iraq and Iran. US is going to withdraw from Iraq, correct? Then what would happen to it? What would happen to the oil price if the war was nearby of the oil production regions? I'd agree with author, that it would pump the oil prices up. Who would benefit of that? Russia, with it's export oriented oil industry.
It's not just about Crimea. You're quite right, who cares about Crimea. But do you care about the Middle East region?