Could be something worth talking about IC, since it's actually Ulhar's personal pet peeve that people mistake him as a Dragonborn or has any real history with dragons. Neither he nor his people, the Deep Water Tribe, have any notable history with dragons and has more of a history in regards to their troubles and trials with humans and other foreign settlers. Namely, how Madam Merseger looked like a prophet leading her people to the promised land, but for the lizardfolk who lived in the desert she lead an army that forced them out from their ancestral homes and made many tribes shut themselves off from the outside world for their own protection. 

Ulhar himself understands this ancestral hatred but doesn't care much for it himself. He sees it as old history and doesn't want to beholden to have grudges only his ancestors feel strongly for. For him, that was just messy business and a natural part of living in this sort of environment; predators compete with one another for the spoils of nature, and the Lizardfolk lost. That's why Ulhar now travels to learn more about the world outside so he can one day teach them how to start winning.