Anyone who says, “I am in the light” but rejects another Christian is still in darkness. But anyone who loves other Christians is walking in the light and does not cause anyone to stumble. Those who reject other Christians are wandering in spiritual darkness and don’t know where they are going, for the darkness has made them blind. 1 John 2:9-11
If someone says, “I love God,” but hates another Christian, that person is a liar; for if we don’t love people we can see, how can we love God, whom we have not seen? And God himself has commanded that we must love not only him but our Christian brothers and sisters, too. 1 John 4:20-21