Well I am currently playing a campaign as Lithuania (started in 1356) and I am in the process of re-converting all of my provinces to Baltic pagan. I am going to try and convert the majority of Europe to paganism yet again, but it is proving to be rather difficult, and I am simply re-converting my own provinces right now. Poland with their PU war right at the get go with the Orders as their allies, it's quite interesting. Anyone have any advice as to how to go about converting these heretics to believing in multiple gods yet again?
I always enjoyed the concept of giving the Christian faiths of Europe (mainly Catholicism) a taste of their own brutality as a pagan country, it just wasn't as "enjoyable" with an Islamic nation, because in the end it's still the same Abrahamic God, and they were just as brutal as their Christian counterparts in many instances (in regards to conversion, conquest etc...).