I believe that Jesus lived I just don't believe that he literally rose from the dead. It seems liberal Christians like the Baptist minister Martin Luther King also didn't believe in a physical resurrection. My theory is that it could have involved mistaken identity e.g. like this example involving 6000 in the crowd:
V: Jesus in Nairobi, Kenya, 1988
Though 6000 people were involved I guess Christians would believe that it wasn't really Jesus based on the photos. But we don't have photos from the 500 person sighting.
In Mark 6:14 Herod thought that Jesus was John the Baptist back from the dead while others believed that Jesus was Elijah. That goes to show in the Bible that a person could be considered to be resurrected even if they looked different.
But I don't think I'm meant to be defending my beliefs which could be non-Christian.