All the different religions are really like different paths leading to the same goal. So there is no question of prescribing any rigid set of principles or practices. Everyone has got the right to follow his own path and approach God in his own way.
Religions are all living faiths and their essence does not consist in their externals such as rituals, methods of prayer, ceremonies, etc. It rather consist in the inner beliefs and convictions which they carry along with them and which give their followers a distinctive character and way of life.