I may have read enough, but scattered over too much time. Perhaps it is different for the other guy, the one you were responding to. Perhaps he 'should' have known. I don't know. Not sure how to measure that and decide.
Of course, if I had read the original post and known you were an atheist, then I assume I would have gotten it, or been puzzled at least.And so the well worn trope that God allows a little evil to make good things appear better, is clearly being parodied by a person who is an atheist.
I mean, it's all fine. You don't have to prevent misunderstandings. But honestly I didn't know you were an atheist. Perhaps I should or 'should' given some interaction, we've had. But I didn't remember until you said it. I did see that post of yours, found it odd, not because I remembered you were an atheist, but found little that I wanted to dig into. He seems to have not remembered.
And heck, (again) people contradict themselves too.
I jumped in here mainly because I have thought quite a bit about what online posting allows, because we cannot see body language, hear changes in voice tone, etc. It allows people to present themselves as if they are sure, confident, unaffected, experts, etc. In perhaps many of these posers could not manage it. We'd see their confusion. They wouldn't have the time to maintain face with a good response.
When I saw his response to you I realized this is a related phenomenon, an effect of not having those extra cues.
This is not me saying you were posing. it's a different phenomenon, but connected to the same limitations of the medium. I'll leave this digression here so as not to hijack.