Jesus had to die on the cross for Christianity to ever exist, because it is prophesied that he would. It is not a sacrifice, and the Bible tells us to work out our own salvation, so clearly Christ dying wasn't enough.
Judus is truly the greatest figure in Christianity, because it is through him that the resurrection was possible, and that is the whole basis for Christianity: Jesus died and resurrected.
Of course, lets not discuss the fact that this is not unique at all, there are several savior Gods that died and resurrected 3 days later, as in fact it is based on the Solar cycle.
The is nothing useful about believing the Bible literally... it will not transform you, it will not bring you salvation... it is just a bunch of words that you think are true.
The Torah is as unoriginal as the New Testament, it has borrowed from Babylon and Sumeria, along with Egypt. The Gospels borrow from various mystery traditions, and get most of their insights from Hellenism.
There is absolutely no point to the whole Abrahamic line, it has done nothing but bring bigotry into the world. Prior, the religions of the world inter-mingled and concentrated on mutual understanding and growth. After, somehow, we get this notion that what a particular guy said is somehow more important than anyone else... we get this notion of prophets to give benediction to men that do not seem special at all.
The world would be a lot better place if there had been no Abraham, the offspring of his sons - Christianity from Isaac and Islam from Ishmael - have been poison.