“Science” isn’t a monolithic entity like a deity is. It’s simply a belief in the natural cause and effect of the universe we live in. In other words, science is merely a way to describe and explain our world, derived from repeated observations. When people say they “believe in science”, it’s not blind worship- the idea is to present findings and observations in such a way that anyone could theoretically replicate the experiment, given the proper equipment.

On the other hand, faith is the opposite- “the assurance of things hoped for, the conviction of things not seen.” (“Religion” is a system of hierarchical institution based on spiritual faith or beliefs, btw.) Scientists ask questions about the world, and strive to find the answers, but religious folks are content to let those answers simply be “because God”.

So, to disbelieve in science- rather, the scientific method- is purely a rejection of reality. You can, in fact, reconcile spiritual beliefs with scientific truths to an extent but ultimately, learning more about science leads to its own kind of spiritual understanding and beliefs that tend to reject religion. This is upsetting to diehard religious folks because hierarchies demand constant subjugation of inferiors, and to reject that “place” in the hierarchy is an act of major rebellion in and of itself.