I'll argue the why:
1. Religion teaches the annihilation of morals.
2. Humans develop morals that are not easily annihilated or at least ignored.
3. There is a 50/50 chance of each human developing more or less constructive and destructive morals.
But, because of number one, a human with destructive morals is more apt to act on them. This is why religion is dangerous.
Without religion, the chance of destructive behavior goes down.
1. Religion teaches the annihilation of morals.
2. Humans develop morals that are not easily annihilated or at least ignored.
3. There is a 50/50 chance of each human developing more or less constructive and destructive morals.
But, because of number one, a human with destructive morals is more apt to act on them. This is why religion is dangerous.
Without religion, the chance of destructive behavior goes down.