Our rejoicing at the liberation of our ancestors from bondage should be tempered by the memory, not only of their own suffering, but also of that of their oppressors. As we tell the story of the Ten Plagues, each one of them diminishes our cup of joy.  Dam. Tzfardeyah. Kinim. Arov. Dever. Sh'hin. Barad. Arbeh. Hosheh. Makat B'horot.  Blood. Frogs. Lice. Wild Beasts. Blight. Boils. Hail. Locusts. Darkness. Slaying of the First Born.  Every true modern application of the story of...