According to Osho, yoga is neither theistic nor atheistic; it is a precise science of inner transformation. Patanjali treats 'God' (Ishvara pranidhana) as an optional method to cultivate surrender and prayer, not as the goal. Many routes reach truth; some with belief, some without. Yoga concerns effective laws and experiments; choose the path that works for you.
Yoga isn’t about God or no-God; it’s a set of practices, and belief is just one optional tool.