Gods and Monsters: how to qualify Religion? Balancing believe(able) Interests

On what grounds does the legal order attach rights to something as ambiguous and unprovable as religion and belief? The balance between the considerable significance of being able to express freely satirical criticism of religions, religious dogmas, and institutions, and the scope of the freedom of religion or belief is delicate. What actions must the legal subject take in order to claim rights with a religious object? There is an important call on the legal order to indicate the scope of the legal concept of religion within the meaning of Article 9 ECHR.