It was exactly 20 years ago. My wife and I were attending a Shabbat dinner in Madrid on June 1st when someone gave us the news. A suicide bomber had struck a seaside discotheque, the Dolphinarium, in Tel Aviv. There were reportedly many casualties. It seems there’s no more understanding or, worse, concern among many today about what Hamas actually is than there was that unforgettable Friday evening in 2001.