I tend to agree that it shouldn't be used on the field since as players, kids are watching you. Kids (any race) may see what he said and start throwing that work around without understanding the meaning.
Edit: but at the same time, there's other bad shit said on the field ?♂️
Edit 2: I also believe he shouldn't have been suspended for it (we won the game anyway but still), but maybe just a small fine. I don't really know.