Of course, the concept that theism is positive, and non-theism is negative is two edged sword. If one is convinced that a supernatural entity or entities that dwell in a supernatural world created humanity for the purpose of developing a sentient creature that can understand the creators “power and majesty” and that will worship it/them to their death for the promise of eternal life; then, of course, theism is very positive and non-theism is so negative as to deserve (in some societies and in some times) rejection, ostracism, expulsion, and death followed by a supernatural, everlasting, existence in the fires of hell. Fortunately, in the “enlightened” societies of this age, non-theists and those that follow a different flavor of supernatural belief, put up with relatively mild rejection and only have to suffer an eternity in hell fire.
On the other hand, those that are persuaded by reason and scientific analysis that supernatural entities did not create humanity, do not not direct or “meddle” in the major and minor affairs of humanity, and eschew the reality of the supernatural fantasy of gods and religion; consider non-theism as positive and supernatural theism as a negative aberration of reason and, like wars based on different flavors of religion, something that should be buried in the ancient past of humanity.
However, considering that just the three major Abrahamic religious movements, the star, the cross, and the crescent, include about 3.5 billion people, over half the population of the world, and that the adherents to these basic faiths, despite the vehement conflicts between their major and minor differences, consider non-theism as something evil that should be wiped from the face of the Earth; then the negative label that non-theism carries is written in large red letters.
Even though the basis of non-theism is a search for rational truth without supernatural bias, and is perhaps the most positive endeavor in which the the human mind can engage, the negative, evil connotation that non-theism carries puts non-theists in a position of having to use negative arguments against the ingrained, emotional, positive arguments of theists. How can non-theism become more positive and even provide a rational way that a human being can preserve something of themselves for the future of humanity? I wrote a book about that...