"faith without action is dead." ...  A church whose temporal strength is diminishing... needs to act to incarnate those words..."  so, how do people of faith not let faith-conflict be an agency of internecine violence?
Authentic faith is open to natural and cultural back-grounding that accounts for societal differences, which, however, does not excuse, much less justify wasting nature and internecine violence premised in cultural differences of religious belief.
Faiths of different cultural histories need to join in faith-study so as to find common ground of common belief. This can be accomplished by home-based 'academies' of inter-faith study/ discussions where good-faith people of different persuasions meet and learn from each other the gospel of peace that faith compels.
Standoffish faith culture tends toward conflict and internecine violence. We, nature, cannot abide humankind's self-inflicted violence. Begin yourself a home-based 'Commmunity Inter-Faith Academy'; let peace begin!