scalping is a socially accepted practice in Elvandar, skinning a humanoid being is not.
back in the "wild west" when people would collect scalps, sure it was gross but they needed some way to show the people who gave money for scalps they did the deed.
In the wild west if you skinned someone, they would definitely think there is something wrong with you.
having said all that, I am not saying that your character shouldn't find scalping gross, if you think your character should think that it is gross, then you should. If your character isn't a pansy or an elf that has lived in Elvandar for forever, then you should probably be okay with it or used to the practice.
The right man in the wrong place can make all the difference in the world.