Under what charges was Jesus sentenced to the death penalty under the Sanhedrin?
closed as off-topic by mbloch, rosends, sabbahillel, Avrohom Yitzchok, Gershon Gold May 22 '16 at 16:58
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Note the christian sources that claim that the Sanhedrin condemned the person to death could not have been telling the truth. The (untrustworthy) story in the christian mythology actually contain enough internal contradictions and statements to prove the Sanhedrin could not have been involved. As an example The Trial of Jesus points out that the three versions given contradict each other so that at least two are false. The Trial Before the Sanhedrin shows how none of the accounts given could have been true.
Error #1: The Sanhedrin convened at the high priest's house Mark mentioned that the Sanhedrin met in the house of the high priest while all our other sources on the Sanhedrin tells us that the council does not convene anywhere else except in the Chamber of the Hewn Stone in the Temple. 
Error #2: The Sanhedrin met at night The Sanhedrin was said to have conveyened immediately after Jesus was arrested and taken to the high priest's house. This was after the Passover supper and the prayer at Gethsemane which makes the council meet around 9 to 10pm at night. This is again incompatible with what we know of the procedures of the Sanhedrin which disallows nocturnal meetings. 
Error #3:The Sanhedrin conveyed on the passover To add to the absurdity, this night, if we are to believe the synoptic chronology, was passover eve and by Jewish reckoning already the 15th of Nisan, passover itself. As many eminent Jewish scholars have pointed out, this is simply inconceivable, given the strict ruling of no council meetings on the Sabbath, and on religious feast days, such as the passover.  We quote the Jewish scholar, Joseph Klausner from his book Jesus of Nazareth (New York 1925):
the Sadducees themselves would not have conducted even a simple judicial enquiry either on the night of the passover or the first day of the passover...the mishnah lays it down that capital cases may not be judged on the eve of a Sabbath or on the eve of a festival to avoid delay should the case not be finished that day, since all trials were forbidden on a Sabbath or a festival. 
Error #4: The Sanhedrin pronounced the death sentence immediately Another procedural impossibility is given in Mark 14:64 which includes the sentence: they all condemned him as worthy of death. This means that the sentence was passed on the same day instead of the prescribed interval of twenty four hours.  These procedural flaws in the Markan account weighs heavily against any claims of historicity for the episode described there.
In short almost every point in the Markan account of the nocturnal trial of Jesus is incompatible with what we know of the Jewish council. In short Mark's account is fiction; and poor fiction at that!
In Luke's account, the nocturnal trial in Mark was omitted but Luke's story of the trial in the morning is still subject to the same objection as against Mark's, for the trial was conducted on passover day itself, something we have seen as impossible. Luke's story of the trial before the Sanhedrin is as unhistorical as Mark's.