Revisionist history, or the Gospel truth?

This man, Pauline Father Gabriele Amorth, is the official exorcist for the Vatican. In a recent radio interview and subsequent news story, he offered the following sentiments:

"The devil can possess not only individuals but also entire groups and populations. For example, I am convinced that the Nazis were all possessed by the devil. If one thinks of what was committed by people like Stalin or Hitler, certainly they were possessed by the devil."

So two of history's most high-profile murders were, indeed, only doing what the Devil told them to?

I'm not sure anyone can say for sure that these folks were truly possessed, but their actions were ghastly enough to make you consider that possibility. But before we start hanging labels, consider what the Bible has to say about a person possessed:

Matthew 8:28-33
And when he [Jesus] was come to the other side into the country of the Gergesenes, there met him two possessed with devils, coming out of the tombs, exceeding fierce, so that no man might pass by that way.

And, behold, they cried out, saying, What have we to do with thee, Jesus, thou Son of God? art thou come hither to torment us before the time?

And there was a good way off from them an herd of many swine feeding.

So the devils besought him, saying, If thou cast us out, suffer us to go away into the herd of swine.

And he said unto them, Go. And when they were come out, they went into the herd of swine: and, behold, the whole herd of swine ran violently down a steep place into the sea, and perished in the waters.

And they that kept them fled, and went their ways into the city, and told every thing, and what was befallen to the possessed of the devils.

I'm guessing that nobody was with either Hitler or Stalin 24-7, but I seriously doubt that either exhibited supernatural strength or similar physical manifestations of possession.

But then again, perhaps there were some who witnessed actions that were out of the ordinary. Consider this site and the lengthy article, "Demonic Possession of World Leaders."