So, is the moral of the story here is that the only way to eliminate a religion for good is to destroy the founding Civ and remove any remaining followers? Or will there captured Holy City still produced pressure for its original religion, even if I have use a GP or Inquisitor to remove all the followers?
If you bulb an inquisitor on a captured Holy City, it will stamp out the special Holy City internal pressure, but to truly stamp out the religion itself you need to eliminate all followers, everywhere.
On a side note, I can see one small advantage to keeping a captured Missionary unit: they make good scouts, since you can explore the other Civs' territory without having to enter into an Open Border agreement![]()
Missionaries can zip around quickly (4 movement points), but they can't pass through other units and can suffer attrition and die without open borders. Also, you are paying gpt maintenance on the missionary.