The earliest polemic against Christianity focused on the circumstances of Jesus’s birth. “We have not been born of fornication,” says a hostile gathering to Jesus in John’s gospel. The implication being: we weren’t, but you were. In the second century, the Greek writer Celsus wrote a book about how Jesus was the illegitimate low-birth offspring of a spinner called Mary and a Roman soldier called Panthera. The implication may also have been that she was raped. Various later rabbinic texts refer to him as Jesus ben Pandera. All of which was intended as an insult: Jesus was a bastard. Obviously the son of God couldn’t be a bastard. So, the argument goes, Jesus was not the son of God.