>>12883653"A god" implies that there is more than one god, because of the article "a"
When you drop that article you move from referring to a singular entity to talking about an entity named "god", which is always the monotheistic God and never a polytheistic god.
No one would ever use just "god" to talk about one of many gods, they would only ever use it to talk about the monotheistic "God".
You're being an autist and you don't understand how language works.