Why would looking down on others on the basis of being "better historians" any different than looking down on others for any other reason?
Aside from that they aren't better historians?
There is such a thing as justifiable arrogance- which can be annoying, but at least succeeds in it's own terms. A good historian may be 'know more than thou', but at least they could be a reliable source for history. The Dalish aren't- and yet use their narrative as their raison d'etre and for a host of other condemnable traits and flaws.
Everyone has imperfect history. Not everyone has their history so wrong in such important ways- or relies on that poor history to justify so many current-day sins.
Because all other factions do it. Dwarves, City Elves, Humans, Qunari, all of them are part of racist or xenophobic or classist cultures that hate certain others as much as Dalish Elves do.
And they all face criticism for racist and xenophobic and clasist cultural elements.
These are flaws, and worth condemning, even as every culture is distinct in its nature and degree. Just because everyone (personally and culturally) is flawed doesn't mean that everyone is flawed in the same way, and thus univerally equivalent and not worth mentioning.
This thread is about the Dalish and why people dislike them. The elements people dislike about them are the topic. Create a 'Deconstructing Qunari Hate' thread an you'll see fewer criticisms of the Dalish and more of the Qunari. Create a 'Deconstructing Chantry Hate', and you'll see the criticisms for the Chantry (including, yes, '