Please don't presume things about religious people, especially since you're not one yourself.
EDIT: I understand where you are coming from. I follow the most liberal and rational interpretation of Islam. But feel like we are very small minority.
But I agree that many Muslims have a...lot of folk beliefs and take a lot of mental shortcuts that lead to reductive interpretations of the religion. In those cases, bringing up good Islamic jurisprudence usually works.
With all due respect, the worst people you can ask for religious advice would be family elder, imams in local mosques. In that order. Find someone who actually studied the religion not just someone who memorized a book.