Apologist William Lane Craig finds the notion that the reputedly risen Christ can be explained as a mistaken identity to be absurd. Craig has said that he debated a skeptic who, out of desperation to save face in his debate over the resurrection with Craig, argued that Jesus could have had an identical-twin brother who was mistaken for Jesus after Jesus was executed.
I'm not so sure if the idea of Jesus having an identical twin brother is so absurd. No doubt there are cases in which an identical twin is misidentified as his or her deceased twin, and some people, especially those who are unaware that the deceased twin had an identical twin brother or sister, could think the deceased twin has come back from the dead!
But a case of misidentifying Jesus need not involve a twin or even a sibling. Any man who resembled Jesus may have been mistaken for Jesus. In those days there were no cameras, and exactly what Jesus looked like may have been unknown to most people who had heard of him. Consequently, it would not have been hard for them to believe that the man they were seeing was the risen Christ.
I'm not so sure if the idea of Jesus having an identical twin brother is so absurd. No doubt there are cases in which an identical twin is misidentified as his or her deceased twin, and some people, especially those who are unaware that the deceased twin had an identical twin brother or sister, could think the deceased twin has come back from the dead!
But a case of misidentifying Jesus need not involve a twin or even a sibling. Any man who resembled Jesus may have been mistaken for Jesus. In those days there were no cameras, and exactly what Jesus looked like may have been unknown to most people who had heard of him. Consequently, it would not have been hard for them to believe that the man they were seeing was the risen Christ.