This has not come up for me before but it seems you can't tell an AI to stop spreading their religion if you've not founded one. I had (in this case) hinduism which gave me cathedrals and mosques and it has been replaced with protestantism which gives sweet f.a. (since he was one of the last to found)
I think religious solidarity is pretty weak in this game. Considering how badly AIs spam missionaries I'd like to see non-founding AIs stick up for the religion they have or at least encourage one compatible with their aims within their borders. That would mitigate some of the AI spam. It's pretty lame I can't get annoyed with Hiawatha for religious spread thru diplo. Now if I declare war to make him stop I'm just going to be a warmonger.
I think religious solidarity is pretty weak in this game. Considering how badly AIs spam missionaries I'd like to see non-founding AIs stick up for the religion they have or at least encourage one compatible with their aims within their borders. That would mitigate some of the AI spam. It's pretty lame I can't get annoyed with Hiawatha for religious spread thru diplo. Now if I declare war to make him stop I'm just going to be a warmonger.