from wikipedia: Dogma (the plural is either dogmata or dogmas) is belief or doctrine held by a religion or any kind of organization to be authoritative. Evidence, analysis, or established fact may or may not be adduced, depending upon usage.
since we have explored the reasons why people believe in different supernatural manifestations (psychology, biochemistry, tradition, society etc.), we know that any new idea (such as FSM) can become religion of the same order as Christianity, given time and effort. if you had never heard of a being called 'God', instead had been taught about the Flying Spaghetti Monster all your life (in a community of believers), would you not then relate your spiritual connection to It?