He who is kind only to friends does not know what love means; for complete love includes love of enemies. (religion-online.org)
For instance, the early Church did teach love of enemies in a way that reflects direct dependence upon the Old Testament rather than upon Jesus (cf. Romans 12:20 - 21, quoting Proverbs 25:21). (firstthings.com)
He can, with no qualms, assent to any of the catechisms of historical Christianity, but for some reason thinks God is wrong when he teaches love of enemies, therefore rejecting that teaching. (nakedpastor.com)