Possible Clues:

• This is why, say, it's impious
• Unorthodox tenet
• What Galileo was nearly convicted of
• Let me present statement of why this is not in good faith
• It may make a church cross
• Act of messing with doctrine
• Opinion contrary to generally accepted beliefs
• Doctrine that differs from the orthodox
• I give you the ultimate in impiety!
• Let me show you why I say this view is unacceptable