"But love your enemies, and do good,
and lend, expecting nothing in return;
and your reward will be great,
and you will be sons of the Most High;
for He Himself is kind to ungrateful and evil men."
Luke 6:35
We must above all show charity to our enemies. By this you may know that a man is a true Christian, if he seeks to do good to those who wish him evil.
-- St. Alphonsus Liguori