but I believe that's often because they match some parts of the anti-semitic stereotype, rather than being intended as such.
This is an important observation, although I think we might be arriving at different conclusions.
The debate about orcs is often badly misunderstood/misconstrued. In other forums I keep seeing people say, "Orcs aren't meant to be <insert real world enthnicity>!" Right, they're not. But that's not the point. Here's the issue, as concisely as I can explain it:
1. For as long as we have written records, including both the very recent past and the present day, people have justified enslavement/subjugation/genocide/cruelty by portraying the "other" as inhuman.
2. That is often accomplished through use of the same stereotypes: ugly, stunted, vicious, primitive, promiscuous, emotional (as opposed to rational), unclean
3. Over the centuries, this has resulted in our (subconscious?) association of these characteristics with people who are intrinsically "bad".
3. When storytellers (authors, artists, filmmakers, RPG creators) want to signal to their audiences that somebody is the villain, they naturally use the language and imagery that most effectively conveys that, even though they might not consciously be trying to use real world people as the archetype.
So the criticism of the use of this device in RPGs is two-fold:
1. It reinforces, probably unintentionally, the long-held belief that an entire ethnicity can be, well, promiscuous, violent, less intelligent, etc. Yes, people can "tell the difference between real life and a game" (oh lord am I SICK of that argument) but media portrayals, even fictional ones, have a way of altering our perceptions of how the world works, even when we know it's fiction.
2. To members of ethnicities that have been...and
still are...subject to these stereotypes, this connection between language and discrimination is more obvious, because they personally have experienced it, and/or just because they (naturally) have a greater awareness of the history of it. To encounter it in a roleplaying game is probably somewhat analogous to a rape survivor encountering a rape scene in a game. So to tell somebody, "Hey, relax, orcs aren't meant to be you" is a little like telling the rape survivor, "Hey, chill out, that rape victim isn't YOU." (EDIT: and just because a single rape victim can be found who laughs it off and claims not to mind, doesn't mean it's ok.)
All that said, I like having orcs as bad guys to slaughter. I find myself wrestling with the issue because I don't want that part of the game to change. And yet I believe all of the above. It's hard. Anybody who says the answer is simple...in either direction...is wrong.