Tieflings in Falandar
What the post is about: the treatment of tieflings in different kingdoms as well as their origins.
Origins
Tieflings came to be after the first Demon War. The heroes who fought against the demonic incursion were cursed by the Dukes of Hell to appear more like the demons they slayed making the first tieflings.
Treatment in Falandar
Tieflings are known as the most regal race. Their eyes as varied as the earths gems, their skin a whole chromatic spectrum, their animal features showing their ties to the nature from whence we came and their horns remind us of the demons their for-fathers slew.
Of course this could have gone very differently and it has in some places. The nation of Dragma sees tieflings as a vile corruption, a curse, even if there human ancestors were heroes that held back the demonic hordes, they should have died as heroes instead of baring the vile mark of those they bested. They fear what the corruption could do to people and that their fiendish blood might drive them to evil as it drew the first ruler of Dragma, Ivan the Mad.
Other nations such as the Duchies see Tieflings as a race to be revered but not quite enough to have become the nobility nor the ruling class. The Duchies chose to keep their bloodlines pure of fiendish blood all those years ago.
Then come the Flora Kingdoms in the west, Escia, Gladsia, and Palhosia. Here Tieflings weren’t just honored, they became the Kings and Queens of the land. The Flora kingdoms used to be a loose assortment of houses until the First Demon War United the houses under 3 banners. The Stag of Escia, the Ram of Gladsia, and the Wolf of Palhosia. The rulers of these 3 great houses became Tieflings after the war solidifying a bloodline of warrior Kings and Queens for ages to come.
TL;DR: Tiefling racism exists in some places like Dragma, but the rest of the nations are cool with tieflings and some raise Tieflings as a royal or noble race of people do to their history.