from John 19:
i) The correlation in v.7 & v.12 of the terms 'Son of God' and 'King' suggests that the Jewish leaders were not accusing Jesus of claiming divinity but of claiming to be the Messiah;
ii) The irony of the Jewish leaders' assertion, "We have no king but Caesar" being followed in the text by Pilate finally handing Jesus over to be crucified: the irony lies in the fact that to say they have no king but Caesar is the final capitulation.