but Herod the tetrarch, being reproved by him for Herodias, his brother's{TR reads "brother Philip's instead of brother's"} wife, and for all the evil things which Herod had done,

 Here we have the message of John to the people. Nowhere does the difference between John and Jesus stand out so clearly because, whatever the message of John was, it was not a gospel. It was not good news; it was news of terror. 