It is hardly possible that his followers could steal the body from a guarded tomb or likely that they would proclaim him alive and die for that proclamation if they thought it was a hoax. This is the only reasonable explanation for the disciples claiming they saw the risen Jesus. They saw him alive individually, in small groups and in large numbers. They ate with him and held him. They were not deluded by some hallucination.
Visions can t eat and be touched.
They were not telling lies because liars don't die for a concocted story, especially people who had been so consistently taught to value truth. Moreover our written accounts of his resurrection are credible. Early New Testament documents are well preserved. There are thousands of early Greek manuscripts, the original language of the New Testament, and many thousands of manuscripts in other languages to satisfy the literary critics that transmission of the original text from the time of Christ until now is good. There is good reason to believe that the resurrection of Christ was an event that occurred in history.