Papist is a (usually disparaging) term or an anti-Catholic slur, referring to the Roman Catholic Church, its teachings, practices, or adherents.
It's an actual term used in the past BY papists. Imagine that! Here's an idea...instead of finding offense or being offended by terms others use, why not incorporate it into your tagline like I have done. It helps to take the sting out of it - if you are feeling stung, that is. :o)