Aquinas is greatly more rational than that article makes out his argument to be. He liked rational thiking and shows a highly critical element in his work - his work is readily comprehensible to the modern mind.
The conundrum accepted 'God does not exist. God is eternal' is a quote from Kierkegaard who did not credit the primacy of rationality but credited primacy to the realm of Faith.
I personally think K. liked that kind of thought because on the battlefield of rationality, Religion had long since lost the battle (if it ever should have been there! Though K. evidently thinks it shouldn't). If you allow yourself to say 'well, i have faith, i don't have to and indeed can't justify myself' it makes you very difficult to tear down with rational argument, and indeed this represents the frustration of rational argument vs. emotional argument.
I completely disagree with the statement that 'atheism is like belief' - atheism is not close to theism (or meaningful theism) as if you really believe in the God of a religion, that should change how you live your life. If you decide there isn't a God of any kind, you are free to live as you please, as a land primate, on a very pretty rock, in a vacuum bound only by the principles of physics such as they are in this locality of the cosmos and by the training you have received from your fellow land-primates.
FWIW, arguments about the former soviet bloc aside, i reckon in this country if you performed a comprehnsive attitude survey, you'd find that atheists were more tolerant than religious believers. In the absence of such evidence, I am only going to claim that there is nothing peculiar to atheism which maks you more or less tolerant.
anybody got some stats on this?