It takes someone who is either completely deranged or consumed by hatred to attack worshippers during their religious observances and on their holiest day of the year. This is what happened when a lone terrorist, Jihad Al-Shamie, armed with a knife, attacked the Heaton Park Hebrew Congregation, a synagogue in Crumpsall in North Manchester, on the recent Jewish holy day of Yom Kippur. This tragic act of terrorism ended with two Jewish worshippers dead and three seriously injured, while the attacker was shot dead by police. The shock among the Jewish community was profound. For many years now, all synagogues...