I wouldn't be surprised if some of it is coming off the news of the suicide bombing that was carried out by IS in Pakistan. But another part of it could be that one post got popular and so you will see posts following the trends.
On an atheism community you can't expect people to only post about one religion. Maybe something you can do to tie it to your experiences is try and connect the commonalities that tend to infect all major religions. I think its interesting finding those foundational aspects of many mainstream religions and seeing how they use similar tactics and controlling techniques amongst their congregants.
We used to do it where we would set up two big squares of cups filled with beer, and the shots were mixed in amongst the cups. So you could see the other side, just didn't know where the shots were. So we were still just throwing balls, but trying to hit the ships. But we also had multiple people on each team because a 30 rack and a fifth for each side is way too much for a single person.