Aharon Barak’s one-bedroom apartment in central Tel Aviv was meant to be the site of a quiet retirement, after his career as an Israeli attorney general and later Supreme Court justice. When Mr. Barak, now 86, moved here from Jerusalem 13 years ago, he placed his collection of unusual walking sticks — more than 200 of them — by the front door. He hung his wife’s oil paintings on the walls. And his wife, Elisheva, also 86, set her easel by the sliding doors to their small garden. But now, the Baraks’ home is less bestilled than besieged. In recent...