"Whoever mourns for Jerusalem will merit seeing its joy" (Ta'anit 30b). Our Sages seem to be offering words of comfort to those pious Jews over the millennium, who faithfully internalized the suffering of the Jewish people. Though they would not merit seeing the rebuilding of Jerusalem in their own lifetime—that is a blessing reserved for our generation—they would merit seeing the joy of Jerusalem after they were resurrected from the dead.
“And Haman said to King Achashverosh: There is a certain nation scattered and divided amongst the nations” (3:8). Haman was well aware of the Achilles heel of the Jewish nation, the divisiveness that so often characterizes our community. As a small nation, lacking (at that time) a homeland, such unity is much more crucial for our survival than for that of other nations. When we are divided, we are weak; and when we are weak, we are vulnerable. Haman could thus request that, “if it pleases the king, let it be written to destroy them”.