There Are Rules To Atheism?

In a atheist group I'm in somebody called another person a redneck in a derogatory way. The slinging of words lasted a few days and in the end the "redneck" was basically told to leave. All I got out of the entire thing was that two people from two different walks of life didn't agree and names were called...kind of like in grade school. I wouldn't have thought anything about it but the one doing all the mudslinging had a bunch of followers saying the same derogatory stuff about rednecks. I found out that the only way to be an atheist is to be a punk rock listening, all black wearing, total emo, tattooed, fuck-the-world atheist. I never knew there were rules to atheism. I figured that all atheism was was a lack of beliefs in a god or gods. Well butter my butt and call me biscuit. I always thought that as a wrangler wearing, country music listening, line dancing atheist I was still a real atheist. No matter what music I listen to or what I wear changes the fact that I don't believe in any gods, except for The Young Gods. Now theres a punk band I'd convert for.