I believe the negative attitude guessed by religious people on Atheists is that in my view of Atheism, the perspective that only an imaginary entity can bring hope to existence is a deeply bleak view of existence. It's depressing, and therefore, troubling, hence the anger. To see hope in the continuation of life, either during one's lifespan or on the succession of generations is somewhat trivial when you are not conditioned to expect an imaginary eternal being to reverse the horror of death.
The stories of Atheism that I know are definitely not related to tragedies. They are mostly about very smart people who've progressed intellectually enough to see the arbitrariety to stick to a tradition of belief in the actual existence of otherwise obviously imaginary entities. Maybe Atheists are a next species of human in the making. After Homo abilis and sapiens, Homo genius. Maybe the anger is with how limiting and inconsisting the sapiens though it for geniuses.









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