Blind post for the OP:
You named Christians particularly, but since there are other groups who also have beliefs that are not compatible with scientific consensus, I think I can say my opinion too.
Problem with showing too much respect for scientific knowledge and experts while I hold non-scientific beliefs, is that if I go and admit that scientific experts know it all, and therefore I, a non-expert, should shut up, I'm practically admitting that I'm wrong with my beliefs.
I believe in supernatural, I'm a mystic, and I seek to experience supernatural directly. Now, so called scientific world view (I'm thinking of psychology here particularly, I have no degree in it, but I've read quite much of psychological stuff and it's the school that's mostly in conflict with my spiritual interests) doesn't include concept of supernatural, so there is a state of conflict for me between what I believe and what the mainstream scientific consensus tells me on what I should think about spiritual things that are happening in my life.
If I admit that those people know better than I do, I'm practically saying they're right and giving away my beliefs. And I can't do that, so in order to keep my world view, my religion and pretty much my life intact, I must give some doubts for the people who represent the scientific consensus as it is now.
Summa summarum: Disagreeing with scientific experts and probably even discrediting their way of seeing things is not separable from my world view or from my beliefs. It's rather part of the stuff I believe in and part of what I practise.