Christianity and Judas Iscariot

The relationship between Judas Iscariot and the Christian world is one of hatred and contempt. And it is this relationship which I believe defines Christianity and its underlying beliefs. Is it a correct one? No. I believe that perhaps Christianity's view of Judas is something that holds Christians back from truly experiencing that which they profess.
Yes, Judas betrayed Jesus for 30 pieces of silver. This was an act that Jesus foresaw and one which he did nothing to prevent. Ergo, it was part of God's plan that it happen. To my knowledge Jesus forgave Judas for the act as well. It also seems to me that he repented when he threw the coins away and was upset over his decision. Though I can't defend his decision to hang himself, which to my knowledge is a sin.
Christians, though, are told to forgive or run the risk of not being forgiven by God. On top of which, who are we to judge what Judas did when it is God himself who will be the final judge. We are merely to look at what Judas did, why he did it, and realize that we can always repent. But, when we take things into our own hands and not leave them for God to take care of (hanging), we can't be sure of what he may do.
It just feels to me that we can not truly understand forgiveness until we forgive the one man who committed the greatest wrong. We must remember, if it was not for what he did, we would never have been forgiven for our sins through Christ's sacrifice for our sins on the cross. Just something to keep in mind.