We ask Hashem that He not wait until we are worthy and deserving, but rather that He return because of His mercy and compassion upon His beloved children. Moreover, we are asking from Hashem that great mercy be stirred up for His children who have undergone all the tribulations of galus. “G-d seeks out the persecuted” (Koheles 3:15), especially when the persecuted is the righteous and truthful nation of Hashem. Therefore the return to Yerushalayim should be with exceedingly great mercy for all that Your beloved children have suffered and are still suffering out of loyalty to Hashem.