I know, I know. You're just trolling with ignorance. But here's how it works.
Atheism is just a lack of beliefs in gods. It's not a religion. Now you have have an atheist who is dogmatic about other things, usually ending in -ism. Capitalism, communism... But if you question what their theology is (theism being key) you don't get capitalism as an answer.
It's exactly the same as someone being Christian and being a right wing capitalist. Even if the two may statistically go hand in hand, when you ask that person what their theology is, you get Christian as an answer.
Words and concepts matter. You don't get to throw them out for 10 seconds so you can say something, but then expect YOUR OWN words to carry weight.