True i think hope it helps
A biased website would not be a reliable source for a historian because it would not be for that purpose, rather, it would include poor research and facts.
Well for one, they start seeing things in a different point of view, and this possibly led to writers finding a narrative that suits that. So Modernist writers like, lets say Virginia Woolf's style, is mostly free indirect discourse. Like, the inner thoughts become more important. So I'd say it influences the narrative.