“The team is no longer German,” explains an older gentleman in a baseball cap, calmly loading shopping into the boot of his car. “If you look at how many Germans still play, it’s a joke.” “How do you define who a German is?” asks the presenter, a documentary-maker named Philipp Awounou. “For me,” the man replies, “a real German is – and I don’t want to offend you – light-skinned.” “Why can’t I be a real German?” “Because your parents can’t be German.” “My mother is German,” Awounou protests. “OK, yes, good,” says the man with a shrug. “That’s possible,...