And what objectively bad things done by religious people couldn't be done by atheists?
This, and...
Why does it have to be unique to religion?
This.
They are both excellent points, IMO.
This topic is called "Good Things Religion has Done." Not "Good Things ONLY Religion has done." All this stuff, saying things like "Name one thing that a religious person could do that an atheist couldn't" is just red herring stuff.
And yet many of these same anti-theists who point this out will turn around and point out all the bad things religious people have done, and use that as evidence that "religion is bad." It's hypocritical and an insult to logical thinking. Not saying you're doing this, but still.
It feels like you're trying to define the parameters
very specifically. I don't like that.