"... letting other nonbelievers know “there is a community of non-theists who share the idea that we can be good without God"
Satan and sin are doing a great job of blinding these reprobates. It is sad to say that they will spend a very long eternity regretting their lives of ignorance and hate.
Psalm 14:1 The fool hath said in his heart, There is no God. They are corrupt, they have done abominable works, there is none that doeth good."
Matt 25:46 And these shall go away into everlasting punishment: but the righteous into life eternal."