For anyone who's read the Drizzt novels, it's pretty well established that the people of the Forgotten Realms freak out when they see someone who looks like a monster (see the reactions to Drizzt). It's quite jarring that Tieflings are seen as anything but KOS monsters. Based on those books, you'd never even start a conversation with one. You'd just shoot the Tiefling on sight from long range (or flee).
The books are informed by the D&D lore, but they aren't canon. Parts of them became canon, but it isnt a reference set. I see a lot of people point to Salvatore when it comes to certain subjects and its just not a reliable source. Baldur's Gate wouldnt care about them. Like I said earlier, it makes no sense theyre involved with Elturel at all. BG, though, has drow, orcs, all sorts of crap. Depends on what city youre in for the reactions you'll get.
The other thing to take with a grain of salt is that they are going to normalize playable races. Minotaurs are horrific, cannibal, monsters from the abyss who worship baphomet. Yet, people can play them and in most home games wont get any crap for it because everyone is an individual and can choose their own path. So, the populace reacts the same way. Theyre not going to break your balls over the fact you chose an interesting race, so they wont break the NPCs either other than some #mildRacism
imo
