Let's be clear. This is a guy bottled up in Gaza. That's as much as Hamas has conquered thus far. They don't even have the West Bank. Now he's set his sights on Rome!
Maybe he just means the Vatican. It's about the same size as Gaza!
Let's look as Israel completely surrounded by enemies bent on it's destruction. Somehow it's thriving.
When you hear of stuff like that you have to bear in mind the the Arab gift of florid overblown rhetoric. Indeed it's inherent in the Arabic language. All this talk of conquering the Crusaders is just that, talk. If the Arabs had a leader like Saladin and we still lived in a world of archers and cavalry. We might worry. Otherwise rest easy.
As for predictions of the imminent end of the world in 2012. Just so much quasi religious nonsense.