The reason why Trump picked Vance is because that's who Trump is. He would never pick a black man for a VP and he would also never pick a woman (as some still speculate that he will) because he could not stand being around a woman with seemingly so much power. So, being a narcissist, Trump chose a mini version of himself.
teachings of the Bible are so muddled and self-contradictory that it was possible for Christians to happily burn heretics alive for five long centuries. It was even possible for the most venerated patriarchs of the Church, like St. Augustine and St. Thomas Aquinas, to conclude that heretics should be tortured (Augustine) or killed outright (Aquinas). Martin Luther and John Calvin advocated the wholesale murder of heretics, apostates, Jews, and witches. - Sam Harris, "Letter To A Christian Nation"