The love I think Jesus was talking about was the same love that God shows the wicked, dealing kindly with them, in hope they will turn from their wicked course. (2 Peter 3:9) 'Agape', the word translated from Greek, is love based on principle, not emotion. We may hate the bad things the wicked do, but we do not hate them or wish to harm them. Rather, I believe we should follow the Scriptural advice at Romans 12:18-21; "If possible, as far as it depends on you, be peaceable with all men. Do not avenge yourselves, beloved, but yield place to the wrath; for it is written: “‘Vengeance is mine; I will repay,’ says Jehovah.” But “if your enemy is hungry, feed him; if he is thirsty, give him something to drink; for by doing this you will heap fiery coals on his head.” Do not let yourself be conquered by the evil, but keep conquering the evil with the good." We probably do not feel affection for those persecuting us, but we hope they will change before God destroys them.