Exterminate the orcs! (or some other cannon fodder monster)

[goto124]

Well, of course, orcs are a completely evil race that you should kill on sight. That's how they were created to be in Tolkien which is the inspiration for D&D. Orcs don't really have any existence beyond that (and beyond the whole "let's make them different" approach).

Of course, an entire race of sentient humanoids who are always 100% evil is a silly and unworkable concept, but that's D&D for you.

Also, we already have an entire thread called 'Trend towards Non-Evil Races'.