https://www.quora.com/For-what-crime-s-specifically-was-Jesus-crucified
Jesus equated Himself to God. That’s why He was crucified.
According to Pharisees of that time, claiming equality with God was blasphemy, an offence punishable with death. According to the Bible, making yourself equal with God is blasphemy, yes, but you can’t kill a man for that.
Crucifixion of Jesus came by chance, although using spiritual binoculars we believe God planned it all for the sake of redeeming the world.
Trial of Jesus Christ came at around that time of the Jewish customary feast, and setting free a death row convict marked the occasion. Decision on whom to set free was a sole discretion of the people.
Hanging on a tree was considered a befitting punishment for a capital offender.
Barabbas was a death row convict and his death in the authority’s hands was looming. “Jesus’ trial came at the right time,” and the administrative authority asked them who should they (Roman rulers) set free, between Jesus and Barabbas. The religious leaders incited the crowd to choose Barabbas.
That’s how Jesus ended up on the cross.
The Pharisees who refused to accept that Jesus Christ was God incarnate gave the verdict that sent Him to die on the cross.