Pssst . . . reputable historians agree that Jesus Christ probably did exist. As for White, that skin tone and facial features shift occurred as cultural drift over the course of centuries as good ol' Italian ancestry priests introduced the religion to Germanic tribes They ENCOURAGED the act of approbation.
True fact, nearly every ethnicity re-works the image of Jesus and Mary to reflect their own skin tone and cultural traditions. Gasp! Blacks and Browns and Asians do it as well.