When none of the options are what your character would say.

Didn't the Dalish forget/lose most of their knowledge about the ancient elves? Like practically everything revealed in DAI would be a shock to them.  And then Abelas doesn't even consider the Dalish inquisitor to be "his people".

Last I checked, The Who Is Mythal is an optional investigate choice. So a Dalish asking that isn’t BioWare making them ignorant of their culture, the player is doing that.

I'm pretty sure they said that was a script error.

“Look... we got rid of that Alrik, right?" Ralph looked at him seriously. "Meredith will be perhaps more reasonab---” suddenly he laughed “eh, this that bullshit as it sounds… "but at most we kill her…"

DA2, Dissent (Anders quest, Questioning Beliefs) – Because of Meredith will be never "reasonable"...
(Ralph is my proud red maleficarum – and he's a very funny guy. The first part and the second is the canon version...)

Whilst they are a nomadic people, they are aware that at one time they had a great empire with a city at his heart and so it is likely if they associate temples with gods, they may have thought they did have them then but they definitely had them in the Dales. In DAI we find mage robes of the High Keeper which has the following codex entry:

"Dating back to the period of the elven Dales, when the Keepers were not leaders and guides for individual clans but rather priests who served as archivists and magical scholars, these robes belonged to the High Keeper for the largest temple of old Halamshiral, dedicated to Elgar'nan the All-Father and Eldest of the Sun"

So considering the Keepers actually served in the temples to their gods in the Dales, I think they would remember and pass on that knowledge to the clan members, or at the very least the mage members of their clan who are proto-Keepers and therefore responsible for ensuring the lore is not forgotten.

I would definitely have wished that we could more strenuously deny the 3-mage rule every time someone mentioned it, something along these lines:

"Yes, may be there are some clans that do this, just as there are some that live like human bandits, but they are not true to the old ways. At one time all our people possessed magic and thus every mage child born to the clan is precious to us as they take us one step closer to recovering what we once were. Any Keeper that authorises abandoning their mage children or asks them to leave the clan for no good reason is is a traitor to the People. However, it is true that a mage may be banished if they have indulged in forbidden magic as they are a danger to their clan."

Then for Minaeve: "I hardly think you were guilty of this, so you would have been welcomed by my clan."

For Iron Bull may be: "So perhaps you should ask Dalish the real reason she was asked to leave."

To Vivienne: "So as you can see, we are responsible about using magic without being stupidly afraid of it."

Or for Vivienne

Karl in DA2. Tried to play an anti kill Hawke.

Option 1: If I were Tranquil, I'd wish I was dead too. "Help" him.
Option 2: I haven't seen any unhappy tranquils. Maybe it's not that bad.