I would just like to point out that both Rivaini seers and Avvar shamans both had rituals were they got possessed, but at least in the Avvars case they know how to force out a spirit that doesn't want to leave. Just in case you people didn't notice they never say the seers or shamans are possessed by demons. They always says spirits. That's a huge difference. Also in every game so far we have found ways to force a demon out of someone who is possessed. We know for a fact that anyone can be freed from possession without everyone dieing. I would also like to say that if you are arguing that Templars treat mages so bad because the chantry can't rein them in all the way then the Chantry has failed in the duty and is responsible for all they do. My last point is that mages do need someone top hold them responsible for their actions and that can be mages or it can be non-mages. It doesn't matter either way. What you can't have is someone that uses religious doctrine as reasoning or an excuses for their actions. The second the Templar says "well the maker says" their argument is invalid.
O and bringing up Tevinter every time someone mentions what happens when mages are free doesn't make them wrong. The tevinter magisters are massive scumbags because they are massive scumbages, NOT because they can do magic.
I can agree on several things, but the highlighted I cannot side with.
A religious text is meant to guide actions, it also is meant to chronicle history. Whether the text is truthful or not can be an issue, but that is an academic matter... usually involving an extremely important word which is 'context'. Also regardless of the text having truth, being truth, or just being parables to live by the interpretation of those texts' messages can obviously vary... but again that is an academic matter.
An officer enforcing laws as s/he has been taught is not necessarily invalidated by referencing the text of what they are taught.
While IRL text like the US Constitution and our laws are not "religious", well not intended to be "religious", referencing those texts when dealing with a situation should not necessarily invalidate your point. Instead referencing texts which are supposed to guide your actions only displays where you are coming from.
In a situation where debate can be had knowing where someone is coming from provides ground to start a discussion.
In an immediate danger situation such as governed by "realm of authority" / jurisdiction then knowing where someone's coming from allows you to heed or rebel... and given the level of your actions maintain a balanced, consistent moral standing.
To see this concept adequately detailed in another fictional universe watch Qui-Gon Jinn maneuver thru Star Wars: The Phantom Menace.