I don't know how many of you have actually lived in America. If you live in another wonderful country, likely a country without racism in the forms it appears in the states, you may not be aware. The jump from "he said the N-word" to "he is a deeply prejudiced individual" is a huge jump.
I am a non-African American minority and, because of events that took place early in my life, have decidedly never used that word in public or private, ever. But I'm basically the only one I know who has taken on such a vow. I would say 90% of my friends and acquaintances are progressives, or at least vote liberally. It's not unnoticed either, black organizations have also picked up on the rampant use of the N-word by hispanic or latino communities. That's a huge problem and something that is coming between those two communities. It's also common in the asian community. And of course, it's commonly used by the suburban white community.
UC Riverside (a college in America) has put out a lot of research both on how humans tend to use words more frequently that they hear often, and even that they imitate accents that they hear often, and this makes sense intuitively. This also explains why you hear people imitating ebonics so often on TV or even in "Crazy Rich Asians" movie commercials

. Swear words have high circulation for two reasons. The first is music, especially hip hop music (which I love). The second is "hipster racism". I take that term from the former-Lenny Letter journalist who revealed that Lena Dunham's friend group often used such racial slurs to seem "edgy", though it is certainly not exclusive to people like Lena Dunham. Furthermore, of course, if you hang out with African Americans you will know that they refer to each other with that term all the time. Now, I am actually supportive of the notion that some words can only be used by some racial groups, and have never used the fact that other people within those sub-groups use that word as an excuse to myself use those words.
But again I must stress, I'm an anomaly. The science does not change. Statistically, if a word is in high circulation, it's likely to be used more often. Not simply people like Lena Dunham. Justin Bieber was caught using it. Quentin Tarantino. Charlie Sheen. Eminem. Jennifer Lopez. I believe most recently it was Josh Allen. I will quote Cardi B, who also was caught up in a recent controversy over that word:
“It’s just something that like, is a lingo, like even I want to stop saying it,” she explained. “I really can’t stop saying it, I’m sorry.”
“It seems like something that is so normal, which is bad, but it is what it is,” she continued.
Cardi B Reminds Us That Latinos Have A Complicated Relationship To The N-Word
Is the use of the N word an act of impropriety? Yeah, of course. Should it be eradicated outside of the black community? Yes, of course.
But when we declare that John (long name) is a closet racist because he used the N-word, we're establishing a parameter under which I would venture to say that the majority of Americans would be considered racists. You may believe that, and I have many friends who do believe that, but if you don't then that is not a meaningful parameter. A parameter is only meaningful when it identifies only true positives, as opposed to a parameter that identifies fifty false positives for every true positive. We also can't say "well John Long-name is an old white male, therefore, if he says the word we know it's a true-positive where if Cardi B says it we know it's a false-positive." People often reference such arguments as "circumstantial" arguments. They're not, they're simply poor methodology.
Furthermore, if we accept that most Americans are racist, the it would not seem like a big surprise that of a majority racist pool, a racist is being selected.
Overall, I see a lot of people trying to infer a complex sub-conscious mental composition to John Long-Name from only a single, very common, data point. That's faulty logic. He did something highly-improper. Unless you have more data, that's all you know, because that is all you can prove.
I do think there is a point to be made that black athletes may, rightly, feel uncomfortable around him. I think that angle could be explored further.