The real Jesus must have been:
Comprehensible. Jesus was a first-century Jew from Galilee, and so we should expect his words and deeds to fit within this historical and geographical context. His message must have been understandable and on some level plausible to first-century Jews in order to have gained a hearing among them. This is why it’s so hard to see Jesus as a pagan myth or a Cynic philosopher; these portraits simply don’t make sense in Jesus’s Jewish context.
Crucifiable. Jesus must have also said and done things offensive enough to make the Jewish authorities want to kill him. If he only claimed to be a moral teacher, or if he only spoke out against Roman oppression, then it’s hard to see why Jews who shared those same aims and values would want him crucified. There must’ve been something apparently blasphemous about his words and deeds.
Consequential. Jesus left such an impact on the early Christians that they were willing to suffer and die for their testimony that he’d risen from the dead. A failed prophet or revolutionary might have attracted lasting admiration at best, but what could’ve happened to make devout monotheistic Jews worship this man after his death?