Are orcs actually evil?

[Animalmother]

The black blood of the orcs could signify that it was extraordinarily rich in hemoglobin.

This is a hint that orcs were bred in high altitudes, and might also explain their powers of endurance in long distance loping.

Their dark skin seem anomalous, given that they were active at night and inside dark mountains. Perhaps it is a kind of natural camouflage.

I'm not sure what function the pointy ears of an orc might have served. In an orc v. orc fight, and in a cold climate, pointy ears would be a disadvantage. Perhaps they were useful for predation, as are wolves' ears. Perhaps too they were useful for controlling body temperature.