Dawkins thinks it odd that Christians don’t look eagerly forward to death, given that they will thereby be ushered into paradise. He does not see that Christianity, like most religious faiths, values human life deeply, which is why the martyr differs from the suicide. The suicide abandons life because it has become worthless; the martyr surrenders his or her most precious possession for the ultimate well-being of others. This act of self-giving is generally known as sacrifice, a word that has unjustly accrued all sorts of politically incorrect implications. Jesus, Dawkins speculates, might have desired his own betrayal and death, a case the New Testament writers deliberately seek to rebuff by including the Gethsemane scene, in which Jesus is clearly panicking at the prospect of his impending execution. They also put words into his mouth when he is on the cross to make much the same point. Jesus did not die because he was mad or masochistic, but because the Roman state and its assorted local lackeys and running dogs took fright at his message of love, mercy and justice, as well as at his enormous popularity with the poor, and did away with him to forestall a mass uprising in a highly volatile political situation. Several of Jesus’ close comrades were probably Zealots, members of an anti-imperialist underground movement. Judas’ surname suggests that he may have been one of them, which makes his treachery rather more intelligible: perhaps he sold out his leader in bitter disenchantment, recognising that he was not, after all, the Messiah. Messiahs are not born in poverty; they do not spurn weapons of destruction; and they tend to ride into the national capital in bullet-proof limousines with police outriders, not on a donkey.
What struck me about it is that it's actually very similar to Dorothy Sayers's portrayal of Judas in The Man Who Would Be King.
UPDATE: For those more interested in Eagleton's review itself, you might want to read Benjamin Cohen's balanced and thoughtful reflection on it at "The World's Fair".