It's actually worse then you think. In the Lvl. 80 DRG quest, you get this exchange...

Faunhem
He valued strength above all else, and considered the affairs of mortals beneath his notice.
Only the seven great wyrms were worthy of his attention. And among them, none but Ratatoskr truly understood him.
Her song was beautiful indeed, and she graced both dragon and man with her wisdom.
She was invited by Thordan, king of men, to speak on our behalf. Ratatoskr expressed our desire to live in harmony. However, it was known that Nidhogg did not share these views.
When the king asked her how her brother saw mankind, she did not hide the truth. He believed that such frail creatures were incapable of protecting this star, that the task must be entrusted to the seven great wyrms alone.

Orn Khai
And that is why Thordan slew her!?

Faunhem
Ratatoskr had no intention of sowing discord, but the king could not countenance that his kind would be treated with such contempt, that we dragons would seek to claim this star as our own.
He turned on Ratatoskr, taking not only her eyes, but her life.
In other places in Heavensward, it talks about Ratatoskr being the dragon who liked humanity the most. I'll have to double check a lot of dialogue, but I think I remember it being said somewhere that Ratatoskr was the one to revel how important dragon's eyes were to King Thordan I.

The best place I can think to look would be the cutscenes with Hraesvelgr before and after the WoL and Estinean go to the Aery. Hraesvelgr talks a lot about the history of the dravanian/Ishgardian conflict there at least.

And yeah... the FFWiki is infamous in the FFXIV lore community for not requiring any citations for any info put up on there. In fact, it requires a citation for info to be proven wrong and be taken down... so no one takes it as a serious source of lore info at this point. You're a lot better off going to GarlandTools or GamerEscape or some other site that specializes in in-game only information.