Most people in the Young Kingdoms consider the Vonol Nomads a race of unbelievers and atheists who deny the very existence of the gods. This isn't quite accurate. An atheist doesn't believe in the existence of any god whatsoever. The Vonol Nomads accept that gods exist... they just see no use in worshipping them.
According to the Vonol, gods will do what they want, when they want, and how they want, regardless of the wishes of mortal beings. Sucking up to them by offering prayer and sacrifice only attracts these fickle beings attention... and no one really wants the attention of a god to fall upon them.
As one chieftain put it "We need no gods and want no gods. They do not help you stay astride your wolf."