Again, it all falls to choices....for sum1 to have a thought of hatred against a person whom he loves or is related to, he has a chance to choose whether to carry on or ambolish....иr thoughts initiate it, then u have to make a choice.
When people hurt the people they love most, is usually not planned. Sometimes, it just happens when you're trying to express yourself. But that which makes people inflict intentional injuries on others out of pure hatred is a spiritual trouble or demon that need to be cured by prayers because it's prayer that will open their hearts to be able to receive love which then changes them for good. (my opinion)