Developing compassion you feel much happier within—more calm, more peaceful—and other people respond to that. Through anger, real peace, friendship, and trust are impossible, but through love we can develop understanding, unity, friendship, and harmony — this is valuable.
Inter-religious harmony is essential, because each of our religious traditions gives its followers a sense of how to lead a meaningful life. The important thing is to make religion relevant to our daily life rather than simply maintaining old traditions.