Umm, there weren’t any Christians when Jesus was crucified. Jesus himself was a Jew. He lived as a Jew and he died as a Jew.

Christians didn’t arise and start calling themselves that until fairly well after Jesus' death. It started with the separation of Peter and Paul and the failure of the disciples to recognize Paul as an apostle. It ended with the unwillingness to include on equal terms gentiles into the faith movement.

And so Christians separated from the Jewish faith. Paul began the slow work of spreading the faith throughout subjugated states of Rome which eventually led to Christianity becoming the faith of Rome after the Justinian plague.

Anyway, there weren’t any Christians to rise up and stop the crucifixion at the time. And frankly, without the crucifixion, there never would have been any Christians at all. Yeshua Ben Yosef would have lived and died as an obscure Rabbi preaching unorthodox doctrine. Nothing more.