Jesus seems to be misunderstood pretty consistently throughout the Gospel According to John:
Jesus answered them, “Destroy this temple, and I will raise it again in three days.”
They replied, “It has taken forty-six years to build this temple, and you are going to raise it in three days?”
Jesus replied, “Very truly I tell you, no one can see the kingdom of God unless they are born again.”
“How can someone be born when they are old?” Nicodemus asked. “Surely they cannot enter a second time into their mother’s womb to be born!”
Jesus answered her, “If you knew the gift of God and who it is that asks you for a drink, you would have asked him and he would have given you living water.”
“Sir,” the woman said, “you have nothing to draw with and the well is deep. Where can you get this living water?
I could multiply examples, but this seems enough for the purpose of the question, which is why? What is John trying to say by showing that everyone (including the disciples) pretty much fails to understand Jesus throughout his ministry?