Using "retarded" to describe something as "slowed" or "hindered" is not a slur. If I say "The pressure on the break pad did not completely stop the cars descent down the ice, but simply retarded it" then I would not be using it as a slur, because I'm using it in teh form of "Slowed" or "hindered movement".
If I went "Its ****ing retarded that pushing the break didn't stop the car on the ice patch" that IS using it as a slur, as its referring to the fact that the breaks didn't stop as
stupid by referencing through slang mentally handicapped people.
If Rham Emanuel had said "The ideas of the Democrats are all conflicting which has retarded the forward movement on this proposal" I would have no issue with it, and would be going after anyone that tried to make a big deal about it.
But he didn't...
He used it as an insult and a slur, attempting to equate the idea through slang to being stupid, similar to a mentally handicapped person.
That is a slur, that is an insult. Simply because some in society seem to view nigger as worse, and honestly I DO think its worse, doesn't mean they're "not comparable" which is what you were arguing. They most certainly ARE comparable, they are both slurs, they are both made to insult and deride by comparing someone or something to something the person feels is a negative (Be it a black person, a gay person, a mentally handicapped person, etc).
To say that calling a person or thing "Retarded" is not comparable, at all, with calling someone a Nigger is to say that somehow its not used as a slur, which is just factually incorrect. YOU are the one that said its "Not comparable" not me, so don't get huffy when your words come back to bite you. They ARE comparable, in that they are both slurs. Could one argue that nigger, or faggot, or any other slur is worse? Sure. But they could not argue they are "not comparable" because they are all slurs.
Retarded, when used in a disparaging way to infer something to be compared to a mentally handicapped person which is the way Rham used it, IS a slur.