"Hateful is as Hateful Does"
I have seen many a person of faith treat others with hate and contempt -- even though they know it is wrong. They will justify the darkness of their heart toward others with passages from the Bible. They will declare, "I love who and what God loves and I hate who and what God hates." Such justification demonstrates that they are devoid of any and all true sense of God in their heart and in their life. For it is the Creator who justifies, not the created.
It is good and right to abhor evil, but it is wrong to hate others. We can hate what people do, but we have no right to hate the person. Why? Because we are no better than anyone else. Unless we have be born from above (see John 3:1-21; key verses 3-8), our heart is just as dark and devoid of God's Spirit as anyone else who does not know God.
Unjust hatred only makes matters worse by the loss of hope and self-worth of the person being inflicted with such hatred from others.
Consider, if you will, the heartfelt plea of a person who has been inundated by such derision and hatred for the majority of their life...