If we remove the tadpole from the equation then I would agree that not helping them could be considered evil.
Then is every tiefling there evil because they're not running out to help the other tieflings?
Seems like a double standard to me.
The point is that you can't just ask random strangers to literally risk their lives for you. You risk your life for your family and friends, maybe even for people who would do the same for you, but that's it.
The Tieflings could offer that they fight alongside you to somehow get safely to Baldur's Gate. That would be a reasonable bargain. No amount of money can compensate one's loss of life.
