Kaminetsky-Greenblatt Heter: Tisha B'Av - The consequence of the Destruction of the Temple

Sotah (49a-b): R. ELIEZER THE GREAT SAYS: FROM THE DAY THE TEMPLE WAS DESTROYED, THE SAGES BECAME OF LOWER QUALITY AND BEGAN TO BE LIKE SCHOOL-TEACHERS, SCHOOL-TEACHERS LIKE SYNAGOGUE-ATTENDANTS, SYNAGOGUE-ATTENDANTS LIKE COMMON PEOPLE, AND THE COMMON PEOPLE BECAME MORE AND MORE DEBASED; AND THERE WAS NONE TO ASK, NONE TO INQUIRE. UPON WHOM IS IT FOR US TO RELY? UPON OUR FATHER WHO IS IN HEAVEN. IN THE FOOTSTEPS OF THE MESSIAH1 INSOLENCE WILL INCREASE AND HONOUR DWINDLE;2 THE VINE WILL YIELD ITS FRUIT [ABUNDANTLY] BUT WINE WILL BE DEAR;3 THE GOVERNMENT WILL TURN TO HERESY4 AND THERE WILL BE NONE [TO OFFER THEM] REPROOF; THE YESHIVAS WILL BE USED FOR IMMORALITY; GALILEE WILL BE DESTROYED, GABLAN5 DESOLATED, AND THE DWELLERS ON THE FRONTIER WILL GO ABOUT [BEGGING] FROM PLACE TO PLACE WITHOUT ANYONE TO TAKE PITY ON THEM; THE WISDOM OF THE LEARNED WILL DEGENERATE, FEARERS OF SIN WILL BE DESPISED, AND THE TRUTH WILL BE LACKING; YOUTHS WILL PUT OLD MEN TO SHAME, THE OLD WILL STAND UP IN THE PRESENCE OF THE YOUNG, A SON WILL REVILE HIS FATHER, A DAUGHTER WILL RISE AGAINST HER MOTHER, A DAUGHTER-IN-LAW AGAINST HER MOTHER-IN-LAW, AND A MAN'S ENEMIES WILL BE THE MEMBERS OF HIS HOUSEHOLD;7 THE FACE OF THE GENERATION WILL BE LIKE THE FACE OF A DOG, A SON WILL NOT FEEL ASHAMED BEFORE HIS FATHER. SO UPON WHOM IS IT FOR US TO RELY? UPON OUR FATHER WHO IS IN HEAVEN.