>> I have no interest in defending the atheism that exists to attack Christianity
Well, you picked the wrong thread to advance your support for atheism.
Where have I supported atheism? I've explained why I'm an atheist, but nowhere have I urged others to adopt my point of view.
If it helps to clarify things, I think the atheist billboards in question are a waste of time and money. Of course, it's their money to waste, so I don't have the slightest problem with it. Free speech and all that.