I believe you have a choice in all. You can ultimately choose what you love and what you hate. People simply don't for a myriad of reasons.. just a few could be
Hate - greed, jealousy, ignorance, misunderstanding, even love itself
Love- wanting, sexuality, longing for happiness, hate - hate for hate itself.
It is human nature to love and hate... It is humans who feel the need to label everything. The brain is one powerful tool... whatever we want - we can make happen and make ourselves believe.
Every single thing in life is a contridction - that is how we decifer right from wrong, good from bad.
This discussion can go on forever with no result or conclusion, the answer is in the question - in that it cannot have an answer.
Life = contridiction... choose your own path and leave it at that.