1. If he was nailed to the cross why is there no references from the other party i.ethose who nailed him? Before the advent of christ there has never been any recorded death by crucifixcation. The common death in those era were beheading, hanging. Even after the death of Christ, there was no record of the Jews or the Roman killing any criminals by crucifixcation.

2. And if indeed he died by crucifixcation, why didn't he reference it when he was alive? After all he reference his resurrection.