It is rather a way of worship. By birth, one can be a Dharmic, just being a good person to all. To be a religious person, one must bring faith upon a founder person and undergo the ritual process. One can achieve God directly without bringing any faith upon a messenger or personal Gods. One cannot achieve God directly without bringing faith upon a messenger, a prophet or a founder person.
Main aim is to make the thoughts and actions of a person nobler for all.
This is known as act of Purification. Dharma is for all, like humanity. So there is no scope of any dispute or fighting. It is singular. So there cannot be any trouble.