A few years ago, The Onion ran a piece entitled "Area Man Passionate Defender Of What He Imagines Constitution To Be." While satire, it underscored an important point: there are many good, sincere people who base their beliefs and principles on what they've been told by persons in positions of false or perceived authority. The problem is the information they're getting is incomplete at best, or, at worst, just plain wrong.
Don't blindly accept what you're told. Read the Constitution. Read the Bible. Read the Tanakh. Read The Book of Mormon. They're all available online.
(Don't bother with Dianetics. Trust me.)
And when someone throws a chapter and verse in your face, go the chapter and read the verse. Then read the verse before and the verse after. Better yet, read the whole chapter. Then read the whole book.
Then think for yourself.