Don't hold your breath. There's a world of difference between good literature and Larian's nihilistic worldview.
I'm a bit ahead of you in Act 2 and so far I fail to see the purpose of the tieflings from a story perspective. Is it 'normal' for a community of tieflings to exist in FR?
To put something in spoilers type (without the spaces):
[ spoiler ] Put stuff here, then [ /spoiler ]
This antiquated forum software doesn't allow the direct posting of images; one has to use a third party site and post a link to the image.
The Tieflings are the Kenny from South Park. More seriously, they're just basically your stand in for stigmatized and defenseless refugees. I really think they dropped the ball with Zevlor after Act 2.