In the wake of the massive raid at Donald Trump’s Mar-a-Lago home, politicians and pundits are hectoring Americans to blindly trust the FBI. “The men and women of the FBI,” Attorney General Merrick Garland proclaimed, “are dedicated, patriotic public servants.” But the FBI would be more credible if it didn’t claim a right to secretly wield almost unlimited power. Most Americans (53%) view the FBI as “Joe Biden‘s personal Gestapo,” a recent Rasmussen poll found. FBI actions 30 years ago at Ruby Ridge help explain the G-men’s fall from grace. Randy Weaver and his family lived in an isolated cabin...