Let me be real clear: this message board does NOT need conservatives

It would be helpful to have this list somewhere. People being expected to know which insults are seen as reflecting well on the speaker and ones reflecting poorly on the speaker should be known.

Perhaps you could put this list together, sort of like the bad words list that were forbidden before. My recollection of that list was that universal agreement on the specific words to put on that list did not exist, not by a long shot.

Moron was the word that mentally retarded supplanted. It was describing the exact same group of people.

wiki

Anyone using the words idiot, moron, cretin or imbecile are just using older words for the same group of people who were called mentally retarded, which was the neutral word that supplanted those words when they became derogatory.

In 2010, Obama passed a Bill to take the term “mental retardation” out of laws and government documents and replaced them with “intellectual disability”.

As Colibri points out here, because of the euphemism treadmill, that term will become a negative term as well.

As long as people consider others with less intelligence to be inferior, the words will continue to cycle and change, but the meaning will be the same.