John 13:31-32 When he was gone, Jesus said, “Now is the Son of Man glorified and God is glorified in him. If God is glorified in him, God will glorify the Son in himself, and will glorify him at once.
I’m thinking that dealing with Judas was the last bit of evangelism that needed to be done. You may say, “But Judas rejected Christ; how can that be evangelism?” Ah, but evangelism isn’t saving someone, but sharing with someone the Gospel of Jesus Christ. We have no control over what decision he will make. Jesus had tried for three years with Judas, but Judas simply wasn’t buying it. He had an agenda and it was to deliver Jesus to the authorities for money. He did have buyer’s remorse later, but it wasn’t enough. He had missed his window of opportunity–a huge 3 year window!
Now it is all about the cross. Jesus’ glorification was wrapped up in His obedience to the Father. Ours is, too. We glorify God through our obedience and He glorifies us when we are obedient. Just like Jesus.
I don’t know why the editors of this Bible chose to emphasize the prediction of Peter’s denial when the main idea is Jesus’ new command:  “A new command I give you: Love one another. As I have loved you, so you must love one another.
 By this all men will know that you are my disciples, if you love one another.”
Jesus had just commanded them to serve each other by washing feet; now He tells them to love each other as He has loved them. “Agapao” – to love with the heart and the head; with feeling and intention. THIS is how we are to love each other. We make each other our aim and marginalize the world. Easy to say, hard to do. It takes work and the power and connection of the Spirit.
This kind of love is undeniable and unexplainable to the world. It is a drawing factor to those who are open to the Gospel.