Why culture is called dogma

Culture is called dogma is that some people's way of understanding and passing on culture is too rigid and inflexible. According to the query related public information shows that dogma mainly refers to a rigid and stubborn ideas or beliefs, lack of flexibility and adaptability, easy to lead to blind obedience and rigidity, in some cases, some traditions and rules in some cultures will be regarded as dogma, because they are set in stone, unshakeable and unquestionable.