You can't deny that abolishing Abrahamic religion wil remove most motivations for war and genocide. There is nothing positive that comes from any of those ideologies. Their only goal is to divide: Us v. Them; Good v. Evil; Saved v. Sinner.
Saved are also sinners. And eradicating knowledge of something won't make it any less true. But it seems that your anti theism is also a motivation for eradicating 4 billion people.