When it's in relation to a post asking, "who's really excluded", I think it's appropriate.

No one is excluded.

I'm pretty sure, if you are offended by the word God, you can substitute another word, such as "Ayn Rand" or "the human intellect". Nobodys insisting that you have to do...anything really.

I am not offended by someone's personally held religious beliefs. I am, however, deliberately excluded if participating means adhering to a code of conduct that targets my beliefs.

Read the CoC more carefully. Adherence is not mandatory.

A general problem with this genre of claims is that they're pure confirmation bias: you don't notice the people who don't tell you, because they don't tell you.

I'm pretty sure they were just trying to be funny.