Mordecai was not alone in this reaction. There was "great mourning among the Jews, with fasting, weeping and wailing; and many lay on sackcloth and ashes" (verse 3).
Evil Haman had a mandate to exterminate the Jews in all the land. Things looked bleak.
But the Jews decided to neither eat nor drink for three days and beseech God to spare them. Our Father God, being the merciful God that He is, heard and answered them. The wicked Haman was hanged on his own gallows, and the people of God dwelled safely for many years.
We must be wholehearted in our mourning if we expect God to hear us.
Notice in Hosea 7 God tells us why He does not hear the cries of some.
"They did not cry to me from their heart when they wailed upon their beds" (verse 14).
God insists on sincerity and truth. In the call to repentance in Joel 2:12-13, the Lord demands: "'Return to me with all your heart, and with fasting, weeping, and mourning; so rend your heart and not your garments.' Return to the Lord your God, for He is gracious and compassionate."
Yes, there are times when we simply must mourn and turn to God, even if our leadership does not.
In Amos's day God condemned the leaders for not mourning when they should have (see Amos 6:6).
In Ezekiel 9 He instructs His obedient angels to place a mark on the foreheads of all who "sigh and grieve over all the abominations which are being committed in the land" (verse 4).
Jesus taught that "blessed are those who mourn, for they shall be comforted" (Matthew 5:4).
Jesus Himself mourned when He overlooked Jerusalem and knew the trouble that would come upon it. He wept openly (Luke 19:41-44).
Yes, there is a time to deeply mourn for our country and genuinely turn towards God. For our generation, I believe that time has arrived.