He attended a Bible study just two days before the face-chewing episode, he was called "the preacher" by his friends, and his mother said that he never left home without his Bible. And he had it with him at the time of the attack. It was, in fact, the only thing he had, as he was otherwise completely naked.
So it seems reasonable to ask: was there something in the Bible that inspired the attack?
Of course it's hard to say, but there is plenty in the Bible that might encourage similar behavior.
Take his nakedness, for example. God seems to like his prophets to run around naked. Here are God's instructions to Isaiah.
At the same time spake the LORD ... saying, Go and loose the sackcloth from off thy loins, and put off thy shoe from thy foot. And he did so, walking naked and barefoot. And the LORD said, Like as my servant Isaiah hath walked naked and barefoot three years for a sign and wonder. Isaiah 20:2-3
God told Isaiah to walk around naked for three years as a sign and and wonder. Maybe Eugene was just trying to do likewise.
And here is what Saul did when the spirit of the Lord came upon him:
Saul ... went thither to Naioth in Ramah: and the Spirit of God was upon him also, and he went on, and prophesied ... And he stripped off his clothes also, and prophesied before Samuel in like manner, and lay down naked all that day and all that night. Wherefore they say, Is Saul also among the prophets? 1 Samuel 19:21-24
The spirit of the Lord came upon Saul and he "lay down naked" all day and night. Maybe the spirit of the Lord came upon Eugene, too.
And then there's this from Micah:
Therefore I will wail and howl, I will go stripped and naked: I will make a wailing like the dragons, and mourning as the owls ... roll thyself in the dust ... having thy shame naked. Micah 1:8-11
I don't know if Rudy Eugene wailed like a dragon, but I'm pretty sure he had his shame naked.
But what about the face-eating behavior? There's nothing in the Good Book that could inspire activity like that, is there?
Well, how about these passages?There's plenty there for a naked, face-eating, bible-believing cannibal to choose from.
And I will cause them to eat the flesh of their sons and the flesh of their daughters, and they shall eat every one the flesh of his friend. Jeremiah 19:9
Therefore the fathers shall eat the sons in the midst of thee, and the sons shall eat their fathers. Ezekiel 5:10
I will not feed you: that that dieth, let it die; and that that is to be cut off, let it be cut off; and let the rest eat every one the flesh of another. Zechariah 11:9
Who pluck off their skin from off them, and their flesh from off their bones; Who also eat the flesh of my people, and flay their skin from off them; and they break their bones, and chop them in pieces, as for the pot, and as flesh within the caldron. Micah 3:2-3
Perhaps Eugene thought that Ronald Poppo was his long-lost father or friend that God wanted him to eat, in accordance with Ezekiel 5:10 or Jeremiah 19:9 . Or maybe that Poppo was just "another" whom God commanded him to eat in Zechariah 11:9. Or that Poppo was one of God's people and, therefore, it was Eugene's job to eat him, as prophesied in Micah 3:2-3.
It's hard to know what God had in mind when he inspired these verses. But I suspect that Rudy Eugene might have a good idea. He and God seem to think pretty much alike.