It's generally agreed, even by atheist sociologists (for example) that Jesus died. He prophesied that He would die. The disciples believed that He would die. The people believe that He died. The post-resurrection appearances do not make any sense at all if He was still physically alive. A survival thesis supposes a massive exercise in deception, if not instigated by Christ, then at the very least colluded in by Him, and Pilate, who was no friend of the Jews and would have been acting very out of character if he did. And either way, it renders Jesus a false prophet and a deceiver, who was happy to sit back and let people die in His name. So, on balance, the popular interpretation of the Qur'an is mistaken. Islamic scholars have suggested as much.