Factual error: Near the end, a prisoner crucified with Jesus is seen taken down dead. Roman custom at the time would not have allowed this. The dead were left up to rot as an act of deterrent to others.
Continuity mistake: Jesus is shown from behind on the cross with large gashes on the backs of his legs. He was flogged across the shoulders and back only at the pillar.
Continuity mistake: In the scene where the Roman soldiers are whipping Jesus and they take him off the post, there are no marks on his back, then the shot changes to when they are putting the red cloth on him, he has two huge gashes on his shoulder, but his chest doesn't have any gashes. Then in the scene right after that, he is walking towards Pilate, and he has many marks on his chest.