Many, if not most religions, rely to a great extent on their respective scriptures. Believers will almost always give deference to their scripture, even when dealing with topics that aren't of a religious nature. This is to be expected, but when is it time to stop?
Believers often expect non-believers to simply accept the teachings of their scripture as evidence for a multitude of things. However, this poses a problem- how does one determine which scripture is more truthful than another? Seeing as how most religions, and by extension, their scriptures, are primarily metaphysical in nature, and hence, not objective, how does one determine, objectively, which scripture one should rely on?
Each scripture says that it is true, but this doesn't make it so. Each scripture says that it is from god, but this doesn't make it so, either. Each scripture makes the same claims about itself as every other scripture, so what is the objective determination that one uses to decide which scripture to follow? Is there even any objective criteria to use in making such a determination?
This all strikes me as a typical OP that assumes very stiff old-fashioned religious attitudes (i.e. scriptures are black/white, true/false, etc.)
Those attitudes are quickly fading just within my lifetime.