Religion is a set of beliefs. Belief in no God is still a belief. There is no proof for or against a deity. Hence why atheism is categorized as a religion with census.

Religion doesn't slow progress or lower general wellbeing of humans. In fact Catholics are the ones that created the big bang theory, pioneered genetics, advances in optics, There are more to list but you can research it.

There have been atheistic terrorists and still are atheistic terrorists in the world.

It's clear you just intend to be a troll and insult religions. Otherwise you wouldn't be claiming "immoral, cruel and sadistic monster". Those capable of reasonable discussion would have found other ways to express their point of view.