I love the story of what happened during the days of the Berlin Wall. One day some of the East Berliners decided they were going to send their West Berlin adversaries a little "gift." They loaded a dump truck with garbage, broken bricks, stones, building material, and anything else with zero value. They drove the truck across the border, gained clearance, and dumped it on the West Berlin side.
Needless to say, the West Berliners were incensed and were going to "get even" with them. Fortunately, a very wise man intervened and gave entirely different counsel. As a result, they responded and loaded a dump truck with food (which was scarce in East Berlin), clothing (also scarce), medical supplies (even scarcer), a host of other essential items. They took the truck across the border, carefully unloaded it all, and left a neat sign that read, "Each gives according to his ability to give."
Message: Kill 'em with kindness. Don't return evil in like kind. Be more magnanimous than that.