@Setanta,
Nostradamus was deliberately ambiguous, and as such people didn't realise Nostradamas 'predicted' something until after the event, Hister/Hitler is a classic example. 2012 has more to do with the Mayans long count, the end of the days for the men of corn, the last men.
People can make analogies with the current leadership in Iran, North Korea, and some of the Republican presidential candidates to paint doomsday scenarios, but at the end of the day if the supervolcano underneath Yellowstone park goes off there won't be many survivors anywhere.