The current Polish-Ukrainian spat over historical issues continues to fester and needs to be handled responsibly, worthy of today's, not yesterday's, challenges.

Poland, steeped in bad memories of the 1939 invasion and decades of Soviet dominance after World War II, is a firm backer of Ukraine’s defense against Russia. But a flare-up over…

Polish Prime Minister Donald Tusk said he hopes Ukrainians will rethink their approach to the Volyn tragedy and urged people in Poland to avoid inflaming emotions. [The Volyn…