DA2 really reduced the groups into some base components, which removed any subtlety.
The big problem you have, is that you're seeing groups of people as a monolith, instead of groups of individuals. I don't blame you, as DA2 pretty much reduced everything to mobs of mostly faceless NPCs or targets to attack. In Dragon Age Origins, groups often have drastically differing opinions among them, and plenty of individuals. Did you know that there are 5 or so schools of magic in Dragon Age Origins? I don't mean literal schools, as in types of spells, but schools as in differing political opinions. That made a huge impact to me, since it indicates some depth to the political climate.
As for the werewolves/elves thing, only the leader of that band of elves was responsible for making those people into werewolves. He did that because they were humans, some of which killed/possibly raped his children (don't remember if that was actually implied). He turned them into werewolves, because to him, they were already monsters. The other elves didn't know any of this, and fought against them because the werewolves blamed them all for their predicament, and also because they were made feral by the transformation. By the time you step in, several generations of elves and werewolves have passed, the leader being kept in an "immortal" state by the werewolf curse. It was a story about forgiveness and letting go, in a kind of hamfisted way, really. By the elf leader ( I wish I could remember his name) finally letting go of his anger and rage, he ends the curse and dies with the curse.
Again, this is like real life. A much, MUCH better description is of human motivation rather than "good" and "evil", is about choosing between what is right, and what is easy. People don't always have easy answers to difficult problems, so you get personally motivated answers.
I specifically said, when looking at them as groups. I'm not saying all of the people in the groups were evil/good.
For the different political sects of magic, I probably knew that... however, it's been a pretty long time since I've played it. So I don't really remember that much of it. And that part was probably one that I don't remember much about, but now that you mention it, I do vaguely remember that or something like that.
Seems to me, that over the generations with the werewolves and the elves, you'd think there would be people questioning what's going on, on both sides. Didn't seem to have that. At least none that I can recall.