If Jesus Christ had not risen from the dead, Christianity would not exist. A religious movement with a dead messiah would attract no followers. Who could possibly be persuaded to worship a crucified man as God?
If you wanted to know who was NOT the messiah, it was someone hanging on a Roman cross.
If Jesus had remained dead, his followers would have scattered to avoid arrest. They would not have had the courage or the desire to risk their lives to spread the gospel. And they never would have died a martyr’s death (as thousands have) for their beliefs.
Something very remarkable had to happen to turn the story around.
Something like a resurrection.
There is no logical explanation for the rise of the Christian faith without the physical resurrection of Jesus. Without an empty tomb, there would be no gospel. Without Easter, there would be no Christianity.