I didn't say atheism itself is a dogma. Rather, the Chinese government (an authoritative body) has dogmatized the atheist worldview by requiring that it be held as incontrovertibly true.

This isn't "wordsmithing", it's a dictionary-perfect example of what dogma is. I think a lot of folks recoil at the idea of atheist dogma because of the history of Christianity-as-law in Europe, especially medieval Europe. But this shouldn't be taken to mean that positive religious beliefs are the only possible beliefs that can be held as dogma.