And in the cold light of day, this thread goes wildly off-topic.
Typical GD. Not that that's a bad thing, but it's not suitable for such serious discussions. A perfect case-study why we need a less-academic/formal sub-forum than SC.
This thread is quite clear in its objective through virtue of the first few pages and especially the title. However, several pages later we have posters like BunnyKillBot and toon_mad completely ignoring the topic at hand and once again using it as an excuse to revise their meta-physical stance. This is not the time nor the place!
Would such a tangent have happened in SC? No. However, would the debate have evolved the way it has in SC baring in mind that SC if far more formal? Again, the answer is no. It has evolved the way it has as GD is unique in its informality, however it's this same extreme which has granted it to go wildly off-topic. Indeed, posters see one poster 'trolling' and assuming it's no longer faux-pas and due to the huge threshold that GD boasts, the numbers quickly add up.
This thread in itself is a case-study why we should trial-run a sub-forum. If worst comes to worst and 'nutters' are attracted - not as if they aren't to SC or GD anyway: remember the creationist bible-nuts in SC a year or two ago that kept coming back? or how about the slave-trade guy? - then just shift the posts back to GD and delete, simple. Job done.
Equally, it is far more easy to remove someone's access to a sub-forum e.g. MM - or in this case the new sub-forum - if they consistently break convention than it is to remove their access to GD as GD is far larger in topical-scope.
Mods, if you consider a trial-run, then may I also suggest you look at a unique set of rules to govern said threads, such as is laid out in the 'big picture thread' for example. You don't have to blanket ban trolls, but the use of the card/warning system would definitely be for your benefit here. Perhaps if someone is assumed to be trolling, they get a strike against their name which lasts for a week (I don't know if your current system supports this or not though?). Three strikes in a week leads to a suspension, etc. In heated threads, such strikes would very quickly add up for trouble-makers.
Again, such a sub-forum also leads to the possibility that those who actively 'hate' on religious threads in GD because they are so frequent it has become tiresome, will have - like say motors - an option to avoid the cesspit altogether.