Poland is trying to hide its culpability in the deaths of thousands of Jews during World War II as Princeton professor Jan Tomasz Gross faces up to three years in prison over his claim that more Jews than Germans were killed by Poles.

Polish-American Holocaust historian Jan Tomasz Gross is under fire after Polish citizens complained about an article he wrote, in which he said that Poles killed more Jews during the Nazi occupation than the Germans.

Liberal Poles accept the overwhelming evidence of Polish guilt in the Jedwabne massacre and have supported public apologies for it. But other Poles argue that the Germans inspired the massacre and armed the local thugs — and that Polish society should not be saddled with the blame.