The Death of Jesus—Historical Certainties
First, there is no doubt that Jesus was killed by the Romans, not the Jews, and that his execution was for political treason – for calling himself the king of the Jews.
Jesus was not the only Jew from antiquity who claimed to be the messiah; the Romans reacted violently against all such messianic claimants, routinely killing them for political insurgency.
But what is striking is that Jesus is never recorded as calling himself king of the Jews in any of his public proclamations. We are repeatedly told in the Gospels that Jesus taught his own disciples privately. And we have a good indication of one thing he taught them: a saying that appears in Matthew and Luke (meaning that it comes from the early source Q) that no later Christian would have made up; thus, this teaching is almost certainly historical.
Jesus told his disciples that they would be the rulers of the Twelve Tribes of Israel in the future kingdom.
But if the disciples were rulers, who would rule them? The answer was that Jesus was their leader now. He was the one who had called them. It was by following his teaching that they would enter the kingdom. It appears that Jesus taught the disciples that just as he ruled them now, so too would he rule them later when the Son of Man arrived, Jesus himself would be made king of the coming kingdom. And this would happen within their own lifetimes, when he was made messiah of the coming kingdom.
This is the secret that Judas betrayed. Judas told the authorities that Jesus was calling himself the future king of the Jews.
For this reason, when the authorities became fearful of a riot, they had Jesus taken into custody and handed him over to Pontius Pilate for trial.
Pilate would not have cared if Jesus disagreed with the Jewish authorities on matters of the Jewish religion or if he had ever committed religious blasphemy. Pilate was a Roman governor of a Roman province, and he cared only for threats to Rome.
The charge against Jesus was that he was claiming to usurp the power of Rome, claiming to be the future king when only the Romans could appoint the king.
Pilate evidently questioned Jesus about whether he called himself the king of the Jews, and Jesus either did not respond or answered truthfully, that he was to be the future king.
That is all Pilate had to know. He ordered Jesus to be crucified, Jesus was flogged and taken to the cross, and according to our earliest records, he was dead within six hours.
Source credit: Dr. Bart D. Ehrman, Ph.D., Professor of Religious History and New Testament Scholar
The University of North Carolina at Chapel Hill