What I'm talking about is not religion in general, but the case when a person declares themselves to be "of a" specific religion, whatever that might be.
What I've encountered frequently on RF is posters who declare themselves to be "of a religion", but who don't follow or believe in any of the basic tenets of that religion. Like Muslims who haven't read the Quran or Christians who haven't read the Bible. To take the example further, I might say to a Muslim, "so, you believe in theocratic rule?". And they say "no". Wait, what?
Yeah and your religion is a naturalistic one, where you believe in science(reason) being able to do morality in the end.
And my religion is a non-metaphyiscal one, where morality is a subjective belief system.
And here is an example of a naturalistic religion, which is objective like some supernatural ones:
en.wikipedia.org
The problem is that you are like most people, who take their own culture as a given in effect as objective but they don't understand it is not.
In short you are for nature and nuture a product of a Greek cultural idea of that we can do morality with reason. We can't as there is no evidence for that, just as there is no evidence for gods.
The problem is this for your version of religion, it is not a special negative one, where religion is something that for general terms can't be observed for in non-religious people as per your understanding.
E.g. that morality is objective as a belief system can also be observed in some non-religious people. Or that it is possible with reason, logic and evidence to say what the universe really is.
In general terms for religion you also do this: "Wherever people live, whenever they live, they find themselves faced with three inescapable problems: how to win food and shelter from their natural environment (the problem nature poses), how to get along with one another (the social problem), and how to relate themselves to the total scheme of things (the religious problem). If this third issue seems less important than the other two, we should remind ourselves that religious artifacts are the oldest that archaeologists have discovered."
You have a belief like everybody else of what the total scheme of things is. The problem is that you have no evidence for that in the end just like everybody else. And you express your beliefs about how to do the natural and social processes like all other humans.
You just believe that you are in effect rational and can do that with a justification that is in effect objective. You can't, but that is so for us all.