Broadly speaking, you’re right about this. More specifically, there are two strains of education that are particularly dangerous to religion. The first is the ability to think critically – to recognize the weak or fallacious arguments that underpin most religious teachings. The second lies in the details of evolution itself. Many believers hold a theistic evolutionary view, but they haven’t thought about the holes that evolution pokes in their theology. One example is the notion of Original Sin. Suffering and death existed before humans hit the scene; animals were eating other animals, microbes, parasites, etc., were doing their thing long before humans evolved; hurricanes, earthquakes, etc., were happening long before humans emerged. Therefore, human “sinfulness” cannot be blamed for upsetting the created order. Take away Original Sin and the whole “gospel story” falls apart – there’s no need for atonement through sacrificing animals, humans, or god-men. Take out Original Sin and Atonement, then, and there’s not much of a foundation left for most of the theisms in the world today.