Is atheism now a cause or movement of some kind?
Sorry to appear dumb here but I always thought that an atheist is just someone who doesn't beleive in any god so how can you rail against god if you don't even believe in a god, just don't make sense??
Personally, I can't think of anything more boring than being an atheist, there's nothing to look forward to is there??
That seems like a loaded argument and a fallacious argument. You could have just as easily asked how you would be able to argue against the existence of a god if you believed in that god. The answer to your question (which you probably intended to be rhetorical, but it is not) is that the only way to argue against the existence of all possible gods is to not believe in any god. This is no more confusing a statement than a person arguing against the existence of unicorns while not believing in unicorns.
I would expect that if you don't like this response you would phrase an argument along the lines of the ontological argument.
I believe here are two types of athiests. Those who do not believe in any god, and those who are essentially anti-religious. It is IMHO the anti-religious who are trying to enforce some kind of freedom from religion. That being said, there isn't much that can be done short of actively defending Christian values in court. You can't legislate people's religious beliefs or criminalize atheism. If we did, this would not be a free America anymore.