It's what the religion is based on, not historical facts. I suppose a dude named Jesus really did live and do something, eventually got executed, but after that it was all the work of his followers generation after generation. You can hardly read a religious books and look for facts, yet it's still the foundation of the religion, so within that context it's also Christ's personality. For all we know the real historical figure might really have wanted to butcher every single Roman and collaborator in that part of the world, as well as every Jew that didn't follow their own code and laws, but bible would hardly mention that. So, in short, relevance wise what we have is the religious figure. The real historial person doesn't exist.