Quote from rew:
There is always speculation in the oil price, as there is in any commodity. So what? There was speculation 20 years ago, too. That doesn't explain why oil is higher now than it was then.
Speculators always get blamed when the price of a commodity goes up, they never get credited when the price of a commodity goes down, even though you'll find as many speculators on the short side as on the long side. It seems that a major social function of speculators is to serve as whipping boys for the political class when oil or food gets expensive for reasons that are either nobody's fault or are due to bad policies by the politicians.