20 Whoever claims to love God yet hates a brother or sister is a liar. For whoever does not love their brother and sister, whom they have seen, cannot love God, whom they have not seen. 1 John 4:20
The true mark of a follower of Jesus Christ is that the love of Christ lives within them and is at work in their life on a daily basis. It is impossible to claim to follow Jesus and not love other people. We are called to love the Lord our God with all our heart, soul, mind, and strength and love our neighbor as of ourselves.
Jesus said that in the last days the love of most would grow cold. The love of people grow cold because of increased wickedness in the world. As darkness increases those whose hearts are not given to Jesus Christ grow harder and harder. But one of the greatest witnesses for Christ in these last days is the love of Christ in the heart and life of a true believer and follower of Jesus Christ. Love is not a thought, it is defined by action and those who claim to be followers of Jesus Christ will be people of action.