Our views on some of this are closer than you might think. I've written numerous articles against scientism and on the pragmatic, instrumental assumptions of scientists.
Still, scientific knowledge isn't a delusion, or if it is, the word has no meaning. If you don't like the word "delusion," we can ask whether religious beliefs are compatible with the scientific worldview. If not, that should cause cognitive dissonance which the informed religious person would want to somehow relieve. Either way, that can make for a lack of intellectual integrity.
The religions that are most compatible with science are the liberal sects that have been secularized and compromised. Those religions are little more than social clubs and self-help workshops. The religions that retain the premodern worldview will obviously have a hard time fitting in with what science tells us the world's like.
I agree that science tells us about quantities and objective facts, not so much about values. I've written lots of articles about the naturalistic fallacy. Yet that's where philosophy is needed, to tell us which values are best. So religion can conflict with philosophy too.