It is not what you’ve omitted that is problematic. It is that you have included a raft of illogical, erroneous and silly shit.
For instance, you assert that atheists are naturalists and therefore believe that society has no intrinsic value. Specifically, you said:
What the fuck? That last bit does not at all follow from anything that preceded it. That assertion is just plain stupid.
You assert that atheists believe that their views on an afterlife are superior to the religious Muslim views on an afterlife, so therefore they believe that they are superior to that person. Do you really not catch the logical flaw in that chain when you read it back?
These are just basic and fundamental errors. Dramatic leaps of logic with no foundation.
I think the real problem is that your fictional Muslim friends are looking for a post hoc rationalization for killing people. I don’t think they care what a realistic understanding of atheism is.
Why you are so averse to actually understanding atheism, I cannot hazard a guess.
What is atheism based on? An absence of a belief in gods, as you’ve been repeatedly told. That’s all there is to it.