The Nesivos begins his commentary on the Haggadah, Ma’aseh Nissim, with a question that has, unfortunately, recurred constantly throughout Jewish history: If a prisoner were freed from jail, would he celebrate the anniversary of his release in subsequent years if, in the meantime, he had been returned to an even crueler and more impregnable prison? And if not, why do we sit at our festive tables and invite guests to join us in celebrating the Seder, even though we are now sunk in a long galus?