It appears he was fired for saying basically: "We shouldn't have any shows that use the term 'retarded' because it can be as painful for a developmentally disa

It appears he was fired for saying basically: "We shouldn't have any shows that use the term 'retarded' because it can be as painful for a developmentally disabled person to hear as the word 'nigger' is for a black person to hear" As reported he used the "n-word" as an example of something really hurtful that shouldn't be said. Is that really worth a firing? Is it really wrong at all? What am I missing?