The retards say:
1) Orcs are dumb, violent and dark-skinned, so they MUST be analogues for blacks.
2) SINCE orcs are analogues for blacks, they mustn't be portrayed as dumb and violent, because that's racist. Fucking brilliant, I love circular arguments.
Furthermore, that the fantasy genre in general, and D&D in particular, is derived from Tolkien's creation is a fact. Tolkien in his turn drew heavily on old, Norse/Germanic myths and legends, in which evil, dark and traitorous creatures are prevalent (trolls, goblins, dark dwarfs/elves [nibelungen], jötnar, etc -- call them what you will). These serve as the basis for evil creatures, such as orcs, in his Middle-Earth and by extension for orcs in D&D. Since the ancient Scandinavians and Teutons had never even seen a single fucking black person when they envisioned their myths, one should think that it would be a bit illogical to equate dark-skinned people with orcs (or any other fantasy being), but what do I know?