Religion is a cause of evil, because humas are the only ones that can make choices. And choices are what define moral value. The religious are pre-disposed to make assumptions, or presumptions upon the universe, and others based on their "understanding " of a text, or tradition. Choices made within a religious context, are a limited view, while claiming universality. Free societies allow choice as these value individuals, in their own right. Religious humans are not more valued than non-religious ones. Stealing or murder is an absolute value that protects both the religous and non-religious from discrimination. The religious do not have "Divine rights".
Choice is about present realities, ideals, and values of an individual. It is about taking ownership of one's life and priorities. How can any other entity, no matter the justification make or define another's "ought"? The present is the only way to live life to the fullest, because it is only in the present moment that choices present themselves in light of all contigencies.
Contingencies are the varibles that also allow a free universe and choice to another individual. These choices intersect at points in time and must be considered as opportunities, or distractions. The determination over how one will judge a particular choice before them is left open and not a pre-determined value. The only absolute is the absolute of liberty of conscience before the law. Individuals being equal before law, means that there is to be liberty of choice, as there is not to be co-ercion, even by a "God". Humans are indivdiual persons and must be respected as such.
So, the religious and religion define what the 'moral ought" is and set about propagating a "purpose", or "plan" that is force fed to the unsuspecting. This is a collectivist thinking. Collectives do not allow freedom of thought and opinion because the collective;s leaders might just loose their power to promote their agendas. Individuals are never respected their own right, in a collectivist society. The individual is only a "role or function" within the "collective. Collectivist societies serve to further "moral obligations', to the collective under dictators, or Rulers that leave no room for independence of thought, value or purpose. Therefore, religion and the religious are a cause of evil.