A good thing about Zen and Buddhism is that it can be practiced within any religion. It is an exploration of the spirit. Every religion at its heart springs from that spirit.
When you embody spirituality there is no conflict with religion. Religions sometimes present a view of spirituality that can stifle other expressions of the spirit. When you are lead by your sense of the spirit you see that the conflicting beliefs can exist together harmoniously.
When you are secure in your spirituality, you can allow Religious Authorities to be right where they are right and wrong where they are wrong. As you live the spirit, you light the way for others. Buddha, Jesus, Mohammed, Moses, and countless other prophets embodied the spirit, the same spirit that we embody. We all want peace for everybody.