Love goes in the direction of pain. Love does not measure the worth of the person as a guide to its behavior.
Love is generous to all not just to the deserving. Love is its own justification for its actions.
In Luke chapter 10 Jesus explains true love to a man who is deliberately trying to destroy Jesus' credibility. Jesus gives the pure truth to this enemy of His ministry in the form of a story about a Samaritan man who genuinely loved someone who probably would not have wanted to have anything to do with Samaritans.
True love goes generously in the direction of the pain of all people not just some people. To become perfect in our love we must learn with Jesus to deliver the best we are and the best we have to anyone who needs who we are and what we have.
Every culture gives permission to ignore some kind of person. The ignoring of persons may be legal and applauded by the culture in which we live, but love gives no such permission. For true love to flow, we must eliminate from our thinking the categories of people we feel free to ignore and pass by.
When Jesus told His enemy the truth it was an act of love. Jesus was not trying to embarrass the man. He was trying to save him.