That's an interesting description of what a religion is. You seem to have an even lower opinion of them than most of the unbelievers posting.What you are incapable of understanding is when that atheism is turned into action, such as organizations, demands, and screaming for attention, it becomes a religion just like the others.
So what's NOT a religion to you?
How about Major League Baseball? They have organizations called ball teams, demands called rules, negotiations, and strikes, and they run their games and commercials on TV for attention. Are they a religion?
How about the Red Cross? They have organizations and run all kinds of events to get attention. Are they a religion? How about if I told you that they're into blood and use a cross as their logo?