I finally gained access to the restricted section of the Archives at The Library of Ling, and after allowing for author bias, "glorious victory" vs "appalling massacre". The relating of the events themselves is quite accurate. And by having both sides recored it is possible to gain an understanding of each side's view and motivation.
One of the more important things to note is that Demosidhe vary widely in their views on the beings they feed on.
Some seeing us as little more than food and playthings. While others were seeking some form of symbiosis. With some middle ground leaning in the food direction of treating those they feed upon much the way a wise farmer treats his cows and sheep well.
So, basically two camps prey/food animals vs beings we can partner with. The symbiosis group are the ones who lead to the development of dreamwalking and subsistence magic. Interestingly most surviving research into this branch of magic is in the reverse direction. That is to say finding ways to take lifeforce and convert it into magical energy rather than finding ways to feed on magic. Although there are some creatures that are known to do this.
I'll have to look into any connections between magic feed creatures and the Demosidhe later.
In any event, because of Demosidhe that were willing to make a deal, there were people who were hiding the Demosidhe they were partnered with from those seeking to exterminate them.
As you can easily imagine the arguments on both sides were quite heated. "They are just trying to survive. And they give us powers." On one side, and "They are draining your life force while giving you corrupting selfindulgent dreams." On the other. With a dash of "Power to invade people's minds and dreams. By joining with them you become as vile as they are." Just to round things out.
And while there have certainly been Dreamwalkers who abused their powers. There are easily just as many stories of Dreamwalkers rescuing people from dangerous situations or delivering vital information and so on.