Beware of simple explanations
The oldest surviving manuscript fragment of the New Testament is the Rylands Library Papyrus P52, which is on permanent display in Manchester, England. This scrap of scripture is about the size of a credit card, contains a few verses of chapter 18 of John’s gospel, and is commonly dated to the second century.
When I first heard about this, years ago, I thought, “What a bummer…it had to be from the worst gospel.” Christians so commonly swoon over John’s gospel because of its drumbeat promise of eternal life, so they don’t seem to notice some of its evil messages. In chapter 8, for example, Jesus is in conversation with Jews in the Temple complex. This is the ‘loving’ Jesus, according to John (vv. 42-47):