Yet you will find more knowledge from these people simply by observing them.They are not demons(by the definition given by the circles),we have met demons and they behave a certain way,they have a specific nature.
At the end of the day you should always disregard the imbeciles theories until she displays some form of critical thinking with regard to spirits and demons(or anything else).
We have met weaker demons. As demons grow progressively stronger, their behavior becomes more complex. We have never met the highest tier of demons, and none among the highest tier of demons has been known to enter Thedas's material realm.
The theory she subscribes too is not necessarily wrong. It may not be based in advanced scholarship(which we've no reason to expect from her) or critical and systematic evaluation of her experiences, but its not necessarily wrong.
Moreover, people typically hold many inaccurate ideas. A lot of it is simply a matter of education or perspective. The things we don't know vastly outnumbers the things we do.
Criticism of her behavior seems fair, after all, that is a matter of personal preference. Expecting her to have a scholarly view of Fade spirits or possibly mythical beings seems unreasonable however.
He was possibly the guy that destroyed the society.Which is probably why he goes down in history as elven satan.
Not everyone that lives within a society agrees with everything practiced within.
How does such a being come across such a notion though? Spontaneously, one day, "Freedom is important"? He couldn't have gotten it from human societies or dwarven societies of the time.