Look how you can't deny the dismal number of atheists in Muslim countries
"How I can't deny"?
Shia Islam, you are sorely misunderstanding how things are. Are you perhaps assuming that atheism is something that should be contained, "healed" or repressed?
Because if you are... oh boy,
am I going to disappoint you something fierce.
Let me be perfectly clear: this supposed argument of yours hurts your case quite badly.
That Muslims or Islam even see atheism as something to disapprove, let alone to punish with a capital offense, strongly indicates that the religion is not only false but also misguided and fragile. That it needs to create an enemy in order to bring itself purpose. That it is lacking in goals and ends up relying on belief in an extremely unlikely god in order to attempt to build at least a façade of united understanding and purpose.
You seem to think you are giving testimonial of how great Islam is and how powerless evil atheism is when faced with it.
But what I see is a naive confession of how pointless and misguided Islam is and how badly disoriented about the very point of having a religion Muslims have become.