Sha'irullah
رسول الآلهة
I assumed you meant "non-religion" as more or less coextensive with "non-theism"; as I say in my quote, i.e. "non-religion/non-theism".
Perhaps. As I mentioned, deism and philosophical theism can be a tricky ones because they are sort of borderline cases; in certain contexts, they would probably qualify as a religion, broadly construed (i.e. in contrast to non-theism)- whereas in other contexts they would not.
The primary issue with Deism is that it falls under its own category and is shunned by the theists ironically and shunned by the non-theists obviously. It stands in a very dark corner due to its inability to construct anything unified yet alone desired by traditionalists.
It is truly the "dark side" of religion (perhaps being a little too over dramatic)