One slur is not good, while another is fine because the league has not lost any money in a consumer boycott of the name.
In 1992, when Dukakis lost to Bush Sr., it was practically a slur.
It'd be a challenge to find a kid with a disability who hasn't had that slur thrown his or her way.
"deliberate slight, disparaging or slighting remark," c.1600, from dialectal slur "thin or fluid mud," from Middle English slore (mid-15c.), cognate with Middle Low German sluren, Middle Dutch sloren "to trail in mud." Related to East Frisian sluren "to go about carelessly," Norwegian slora "to be careless." Literal sense of "a mark, stain, smear" is from 1660s in English. The musical sense (1746) is from the notion of "sliding." Meaning "act or habit of slurring" in speech is from 1882.
c.1600, "smear, soil by smearing," from slur (n.). Meaning "disparage depreciate" is from 1650s. In music, from 1746; of speech, from 1893. Related: Slurred; slurring.