This is one of the most bastardized phrases used by churchians and one of the most egregiously stupid. Every time they use the phrase it’s not for its actual meaning it’s to pretend you must enable sin because people do it. To churchians false kindness and kumbayah singing is “love”, this modern insane definition is the equivalent of helping a junky OD and calling it “love”.
Love is not cruel or kind, love is doing what’s best for someone. If you love someone they might scorn you for it, but that’s the cost of it. Enabling the sinner is not love, it is sin.
Love is what we are commanded to do. Love also means that you let your brother/sister know when they are falling. Just as they should lovingly tell you when you are out of line