If the idea of loving those whom you have been taught to recognize as your enemies is too overwhelming, consider more deeply the observation that we are all much more alike than we are unalike.
"You meet many wolves in sheep's clothing; you are prey until they find out you have the heart of a lion. You meet many snakes in the grass; you are in danger until you burn the plain in which they hide. Worse than a hostile enemy is an accomplished, secret one. Worse than a foolish superior is an impenitent, arrogant one.
"You bless those you love, hurt those you hate, look up to those you admire, and despise those you detest. Love those who love you: they will respect you. Love those who hate you: men will praise you.
"Critics work for you; they reveal your weaknesses. Critics work against you; they envy your strengths. Wisdom works for you; it counters your weaknesses. Faith works for you; it increases your strengths. Forgive those who hurt you; compassion is the offspring of blessings. Love those who hate you; love is the offspring of great blessings. Be grateful for whatever you have; much is made from little.