Once a question is closed, shouldn't any comments also be closed? The "is there a way to design a realistic religion" question is turning into a debate forum completely inappropriate to SE.
No, comments should not be closed. This is because questions being closed is a temporary measure. If and when the question has had the problems with it fixed (if that is possible) then it can be opened and the comments are a vital part of that process.
If there is specific abuse of comments happening in one question then that should be dealt with there. Looking at the question though I only see 4 or 5 new comments in the last day, not enough to worry about yet although it would be better taken to chat and if the number of comments does explode a moderator will most likely step in and enforce that.