Does your religion claim to have the truth (THE truth)?
Does it stigmatize non-believers?
Does it have a long tradition of religious war? Conquest and forced conversions? Patriarchy? Anti-semitism? Slavery? Resistance to science? Torture and burning at the stake? Corruption?
If it is a relatively "liberal" religion, or a "moderate" or "tolerant" version of a traditional religion, how long has that been the case? For how many generations, for example?