I've said it before, and I'll say it again, I am a goofball who makes little video games on the internet. I am in no way qualified or interested in being at the center of any conversations that involve real-world religion or politics.
As the host of a gamejam I am responsible for moderating and ensuring that everyone involved feels safe and has a good time. If I am not qualified to be a part of those debates or conversations, then I can not properly moderate them. So that is the reason I do not allow games of that nature in the jam.
That is the explanation, I hope it clears things up.