Some people will never learn. He’s one of them.

Oh, and with regard to his upcoming visit to Jerusalem: if he really wanted to do the proper thing, he’d go to Yad Va’shem, and while he’s there, he should go to places like Lochamei Haghetaot and Yad Mordechai (both are kibbutzim whose names are WW2-based - the first one means “the ghetto fighters,” the second is named in honor of Mordechai Anilewicz, one of the leaders in the Warsaw Ghetto Uprising).