No it wasn't displayed as such. I don't care about character opinions on the issue, only facts.
Umm. Nothing is fact, you can't have what you are looking for. The codex entries are written from someone's point of view just as what is said in game is from someone's point of view.
An applicable pop-culture quote would be the "the truth is out there" from the X-Files.
There is one consistent message about Blood Magic from Origins on forward; Blood Magic is foolhardy, perilous and a trick. If you walk that path you're walking in the dark.
That is then driven home in DA2.
All throughout the games it is explicitly said by multiple sources and even ones that are on different sides of certain issues.
To insist otherwise is truly puzzling.