A. It would have been unlikely. An enemy is still a human being, and his inevitable downfall causes more sadness than anything else.
We would much rather that he lived up to his potential of decency and compassion; if he could not refrain from sinning, we would prefer that he repented and came back into God’s good books. We take seriously the admonition, “Rejoice not when your enemy falls: let your heart not be glad when he stumbles” (Prov. 24:17).
The rabbis comment that, despite the wickedness of Haman, his grandchildren rehabilitated the family name and taught Torah in B’nai B’rak (Sanh. 96b).