I’m not sure if it was in this thread, but I have stated that theJewish mindset in the 1st century was such that, nothing Jesus is reported to have done should have resulted in the call for his death. The only thing I can think of is that there is a missing piece from the Gospels. The most likely explanation is that Jesus would have been accused of blasphemy, although none of his actions would constitute blasphey under Jewish law. What may have happened is that he attributed the miracles he engaged in to his divine person, instead of God, or that he used God’s true name in public. This would be a big no-no.
As for the mindset of Jews toward Jesus, I think it is important to realize that it is very unlikely that vast majority of Jews had even heard of him during his lifetime. His ministry lasted a short period of time, and he seems to have had a lesser following than even John the Baptist, based on the fact that the Romans didn’t immediately have him killed, as was their practice with self-proclaimed messiahs.
For the few jews who heard him preach, they would have thought it strange that he was breaking certain commandments (gathering food on the sabbath). Basically, he seems to have been preaching the following of Torah but rejection of Talmud. There have always been a small minority of Jews (Karaites) who have held similar beliefs.
Why did Jesus see a need for such an alteration? I can only guess. But Judaism is a demanding religion with a lot of rules and is not really set up to be a mass religion. Perhaps Jesus wanted to change this. Or perhaps there were politics between the rabbis that he didn’t like. If you read the prophets, you often see them railing about the injusitices and turning away from God. Maybe Jesus was of a similar mind set and went about addressing it a different way.
Just to come full circle, almost nothing he is said to have taught would result in the jewish court handing down a death penalty. Again, I suspect his real crime was what Jews considered to be blasphmey, although exactly what he did to constitute it is not clear in the Gospels.