Lanefan
Victoria Rules
I could, and to some extent have, done just this with Drow in the past; but that doesn't change the surface-folk's perception of them, and it's that perception - aided by eons of surface-Elf propaganda - that's gonna cause kill-on-sight reactions.But that could all be changed very simply if you wanted. You could just say “on this world, Drow are not all evil… they are like any other racial group and run the gamut alignment-wise”. Easy.
And as Demons and Devils are always and without exception Evil, anything claiming itself to be a part-Demon isn't likely to get a friendly reaction from decent folk.
What I did with Drow specifically for my current setting is that unknown to anyone on the surface they've become almost extinct, discovery of which served as a useful, if minor, plot sidebar a few times.
In 5e, maybe. In my system, hells no.That sounds like about 10 minutes worth of work.