The problem is that painting 'there is probably no God' is almost the same as printing 'Atheists are going to Hell'. It's a direct attack on Theists, rather than an expression of a belief or lack of belief. It's not so much promoting Atheism as it is deriding Theism.
Atheism is as much a religion as any other belief system, no matter how much atheists try to argue the 'non belief is not belief' idea. Atheism still has a shared idea of an ultimate truth dealing with the metaphysical nature of the human soul. It may be a different kind of religion than Christianity, but it's still a religious belief system. There are many religions on Earth that don't believe in a creator God, Atheism is just one concept of such a belief and is often ill-defined. I've had Atheists tell me that Atheism is the lack of the belief in anything metaphysical (the soul, the afterlife, God, Gods, Supernatural beings, etc), and others tell me that it is simply the lack of a belief in a creator God (but not necessarily the idea of a supreme being).
Look the bottom line is that Atheists are still a small, fringe group in the world. Promoting Atheism by attacking people's beliefs is not the right way towards tolerance and acceptance of Atheism as a mainstream belief system. Should they be allowed to paint "There is probably no God" on the cannon? Sure, but it's only going to get them negative attention and not mainstream acceptance. Also, adding the modifier 'probably' is more of an agnostic philosophy anyway...
Atheism is as much a religion as any other belief system, no matter how much atheists try to argue the 'non belief is not belief' idea. Atheism still has a shared idea of an ultimate truth dealing with the metaphysical nature of the human soul. It may be a different kind of religion than Christianity, but it's still a religious belief system. There are many religions on Earth that don't believe in a creator God, Atheism is just one concept of such a belief and is often ill-defined. I've had Atheists tell me that Atheism is the lack of the belief in anything metaphysical (the soul, the afterlife, God, Gods, Supernatural beings, etc), and others tell me that it is simply the lack of a belief in a creator God (but not necessarily the idea of a supreme being).
Look the bottom line is that Atheists are still a small, fringe group in the world. Promoting Atheism by attacking people's beliefs is not the right way towards tolerance and acceptance of Atheism as a mainstream belief system. Should they be allowed to paint "There is probably no God" on the cannon? Sure, but it's only going to get them negative attention and not mainstream acceptance. Also, adding the modifier 'probably' is more of an agnostic philosophy anyway...