True, they do have a reputation for evil unique even amongst the shadow races.

There was in times past an evil race of beings, neither human nor ogrish, that made war upon the forest folk.

"And why would you wish to carry the weapon of such an evil race?"

Later, we find out that the bear was left by an evil race called the "Straczyn."

Deep gnomes were not an evil race, but they held no love for dark elves.

But on the other hand, while clearly the ylver were not an evil race, they had their Quaies in high places.

They are presented as an inherently evil race, with whom hostility is the only possible relationship.

But there was no such thing as an evil race.

They were an evil race, feasting on the torture and destruction of other creatures opposed to their rule.

When he brandishes his lance, the evil race falls without strength.