No...we understand perfectly well what atheism means.
In a nutshell... we argue about religion and God because people ACT on their beliefs in religion and God. These beliefs have consequences in the real world.
*Atheists care about religion because of the fact that theists consistently try to push their religious dogma into our laws, schools, and government.
*Theists tell people who are dying of AIDS and starvation that using condoms is wrong because there’s a magical being in the sky (God) who just might want to give them a baby.
*School boards all across this country still have to spend time and money and resources that are ALREADY in short supply on the fight to have evolution taught in the schools, and fight to keep unsubstantiated, bronze-age superstitious drivel OUT of our schools.
*Theists are trying to tell our children that the Earth is less than 10,000 years old, despite the fact that not only is there not a *single* scrap of evidence to back up such a claim, but ALL of the evidence points AGAINST it. This gives our children the impression that it's OK to not expect someone to provide evidence behind claims that they make, and gives our children the impression that scientific facts can be ignored or denied and replaced with whatever information you want if you don't LIKE what the evidence *actually* tells you.
*Despite a thousands-of-years-old pattern of supernatural explanations being consistently and repeatedly replaced with natural ones, theists still think every single unexplained phenomenon can be best explained by God. And whenever a gap in our knowledge does get filled in, believers either try to suppress it (like teaching evolution in the schools), or else say, "Okay, so that isn't supernatural... but what about this gap over here? Can you explain that, Mr. Smarty-Pants Scientist? You can't! It must be God!"
*There are people on this planet who will actually fly airplanes into buildings full of people because they have FAITH that they're going to get 72 virgins in some magical paradise for doing so.
*People will use their religious literature as an excuse to deny other people their rights.
*In a lot of areas in this country, if a person is daring enough to actually admit publicly that they are an atheist, they can FULLY expect to be harassed, discriminated against, and even lose their jobs, have their property damaged, and be physically assaulted.
*There are *so many* religious leaders that opportunistically use religion, and people's trust and faith in religion, to steal, cheat, lie, manipulate the political process, take sexual advantage of their followers, and generally behave like the scum of the earth. And despite the fact that this keeps happening OVER and OVER and OVER again, theists will still say that *atheism* is bad because, without religion, people would have no basis for morality.
*Theists love to tell atheists that they need to be more "open-minded", when it comes to their claims about magical beings that rule the universe, despite the fact that they can't show a scrap of evidence that their claims have any truth to them whatsoever, and yet they aren't willing to pay the same courtesy to other religious beliefs or other things that have no evidence for existence. In theist-speak, "be more open-minded" actually means, "believe ME even though I can't/won't prove my claims and I'm unwilling to believe anyone else's."
*Theists love to say smug, sanctimonious things like, "a lot of you dont want God to exists because you don't want anyone to answer to and you just want to live a life of sin". Of course, they don't really care to actually ask an *atheist* why they don't believe in God. And when they are told by atheists why they are atheist, they completely ignore it and still turn around and make up b/s like "a lot of you dont want God to exists because you don't want anyone to answer to and you just want to live a life of sin."
*Theists changed our nations motto from "E Pluribus Unum" to "In God We Trust", and started printing it on our money in the 1950's. Also, in the 1950's, they added "Under God" to our pledge. We recently had a religious Presidential candidate that said he wanted to change our CONSTITUTION to better reflect his religious beliefs, to the cheers of fundies all over the country. And yet, we're constantly hearing theists say that atheists are trying to "change" everything, and that we're trying to "take God out of everything". We're not the ones making changes. We're the ones trying to keep our county the way it was founded. We're the ones protecting our constitution, not theists.
If other people's religious beliefs did not affect us, we wouldn't care. But they do. So we do care. And we have EVERY RIGHT to care.
If Scientologists were trying to force their beliefs about the alien Xenu into your laws, schools, and government, then you'd argue about it, too.
