Not Paying attention
A close look at this passage shows an amazing thing when Yeshua/Jesus said one of you will betray me and the disciples asked who it was and He said the one that dips his hand in the sop none caught it that is was judas because it goes on to say that they thought when he left he was going to buy something or give to the poor yet i believe they missed it because 1. prophesy must be done 2. they would have killed judas(the rest of Yeshua/Jesus followers)
John 13:21–30Complete Jewish Bible
After saying this, Yeshua, in deep anguish of spirit, declared, “Yes, indeed! I tell you that one of you will betray me.” The talmidim stared at one another, totally mystified—whom could he mean? One of his talmidim, the one Yeshua particularly loved, was reclining close beside him. So Shim‘on Kefa motioned to him and said, “Ask which one he’s talking about.” Leaning against Yeshua’s chest, he asked Yeshua, “Lord, who is it?” Yeshua answered, “It’s the one to whom I give this piece
- This was my thoughts as well; that the disciples must have miss what Jesus was saying. Although, I do not believe they would have killed him. At least I don’t believe Jesus would have allowed them to. As you mentioned prophecy must be fulfilled.