Somewhere in the first 4 books of the New Testament Jesus is (reputed to be) talking about loving friends and hating enemies. He says (approximately): ...Pray for those who despitefully use you, for by so doing, you heap coals of fire on their heads.

Brother Dave Gardner (anyone remember Bro. Dave? Where is he now?) was blunter: "Love yo' enemy -- drives 'em nuts!!!"
(Bro. Dave: "Ah smoke tuhbakuh 'cuz it's a suhthun produk -- Ah'd smoke chains, if Ah could laht 'em.")          Tw