“It’s not a conventional family, David,” David McWilliams says politely. “No,” says David Baddiel (60). And he wasn’t kidding. The Irish Times columnist and founder of Dalkey Book Festival interviewed British author and comedian Baddiel on Friday evening at Dalkey’s Church of the Assumption. Baddiel once pioneered stadium comedy in Wembley Arena and opened up the taboo on anti-Semitism in the UK, but lately his focus has been even closer to home: getting to grips with his mother’s affair with a golf memorabilia collector. Baddiel will soon publish My Family: The Memoir, which delves into his remarkable relationship with his...