Also question is, what did Herod Antipas do to Jesus?
Antipas reluctantly beheaded John, and later, when Jesus' miracles were reported to him, he believed that John the Baptist had been resurrected.
Also, why was Herodias mad at John the Baptist? For Herod himself had sent men who arrested John, bound him, and put him in prison on account of Herodias, his brother Philip's wife, because Herod had married her. For John had been telling Herod, 'It is not lawful for you to have your brother's wife'. And Herodias had a grudge against him, and wanted to kill him.
Besides, why did Salome want John's head?
In order to kill the prophet, jealous Herodias bade her daughter, Salome, to dance for King Herod. The King was so entranced by her dance he offered to grant the girl any wish. At the request of her mother, she asked for the head of the Baptist, which was delivered to her on a platter.
Why was Jesus sent to Herod?
In the Gospel of Luke, after the Sanhedrin trial of Jesus, the Court elders ask Pontius Pilate to judge and condemn Jesus in 23:2, accusing Jesus of making false claims of being a king. Since Herod already happened to be in Jerusalem at that time, Pilate decides to send Jesus to Herod to be tried.
