More hurtful to whom? You are incorrect. If you meant “hurtful to more people” that would probably be accurate.
The issue is not whether the word(s) in question are offensive to you. The question is whether you care that they are offensive to others.
Dave Lowell definitely has a point on the question of overkill, or over-PC-ness. To a large extent, this is a matter of personal taste, and of the person(s) to whom you are speaking.
But here is a good way to test. Ask yourself if the potentially offensive word is something that applies to people who didn’t choose to be that way, or have no control over it. If the answer is yes, you’re probably being rude.
My wife works with developmentally disabled adults. Nobody in her business, especially her clients, likes “retard” being used to describe them, or as a substitute for “stupid.” Being developmentally disabled does not necessarily mean you are stupid, and being labeled “retarded” applies the same amount of assumptions as any other single label. It’s simply not very specific, hence not accurate.
“Retarded” is still used in some circles as a legal or “technical” term, but is generally considered very outdated and not politically correct.
Yes, political correctness can go to far. An amputee will hopefully not be offended if you ask him to give you a hand. On the one hand (sorry), you could be making a rude joke. On the other hand, you’re reinforcing that he still has a good hand, and that it’s valuable enough for others to need it.
You can say to a blind person “See what I mean?” They get it.
I know lots of blind people, deaf-blind people, developmentally disabled people, and the odd amputee here or there.