I'll say it in many ways - but an atheist trying to build a case for objective morality is a stupid enterprise.
And subjective morality is an equally stupid enterprise
---
The one who believes they can have objective morality without the existence of a God...
... is the one who believes their moral decisions are inherently superior to the moral decisions of everybody else
---
without God, you're decision to not take the life of another person is no more moral than the decision of another person to take your life
---
You're preference on what makes a thing moral or immoral does not negate another person's preferences on what makes a thing moral or immoral
---
A thing cannot be determined to be objectively moral by popular vote
---
For all of the various applications that the scientific process affords us, determining objective morality is not one of them
---
The one who denies the existence of God while decrying religion as evil, is a walking contradiction