Next year Leonid Nevzlin will mark 20 years since his escape from Russia and immigration to Israel. When he fled Russia in 2003, Yukos, the oil giant at which he served as vice president, was forcibly broken up and Nevzlin’s associates were arrested and thrown into Siberian prisons on what many claim were trumped-up and politically motivated charges of fraud, embezzlement and money laundering. Meanwhile, the Russian government demanded that Israel extradite Nevzlin, whom it accused of murder, several counts of conspiracy to commit murder and financial crimes. Israel has repeatedly refused. Nevzlin has long been a vocal critic of...