Give any country the right circumstances and anything is possible. In short Nazi Germany arose from an economic meltdown, a sense of national 'revenge' (For want of a better word) and a desire for quick change. Greece is in the worst economic situation of it's history and (don't quote me on this) I believe that their incredibly right wing party has gained a large number of supporters in recent years. Through a sudden outbreak of an apocalyptic disease I think many would turn to a fascist government. A few would disagree but the masses would become compliant. Obviously I won't do anything like that from the off though, simply not enough is known to use any national fear.