Not merely improbable - they've picked just about the least probable things anyone could come up with. Tracey Harris, on the Atheist Experience, once said something on the lines of "you accept talking snakes, water into wine and someone rising from the dead as being actually true, but evolution just blows your mind." It's all very sad.
At the age of five, Skagra decided emphatically that God did not exist. This revelation tends to make most people in the universe who have it react in one of two ways - with relief or with despair. Only Skagra responded to it by thinking, 'Wait a second. That means there's a situation vacant.'