In a rural village with fewer than 500 residents, strangers stand out. Even Anna Osinska, a 93-year-old villager with failing eyesight, noticed when people she did not recognize — refugees from the war in Ukraine — started appearing on the narrow street outside her kitchen window. A former refugee herself, Ms. Osinska felt pity for the Ukrainians and was glad that her country was doing what it could to help them. She has also wrestled with less charitable emotions. “Thank God I don’t feel any need for vengeance,” Ms. Osinska said, recalling how, in 1943, she fled her childhood home...