The Pharisees were the real culprits for the evil act, and everyone involved but the Romans were all Jews, including Jesus. Niether Herod nor Pontius Pilate were anxious to kill him.
By the by, have you seen Popular Mechanic's re-constituted digital image of Jesus as they think he really might have looked? The image is purported to be that of a typical Jew of the time period. It looks nothing like the medieval or more modern images that many have characterized as "genuine" representations (such as the shoud).