Mentioning that Sally is Kenyan is no different than mentioning Gavin Thompson was English or Simon Bairu was Canadian. For the most part whenever there is a write up about NCAA track or cross-country that involves a non-U.S. resident this is done. It’s because an extremely large percentage of college athletes are quite obviously American. Heck, watch any NCAA basketball game, they mention foreign athletes names with their home country all the time (example: the former center for Georgia Tech that looked like a hobbit was from Australia-they mentioned that about a hundred times per game). The difference here is that Sally is Kenyan, rather than English or Canadian, and thus the writer of the letter automatically assumed she was somehow being singled out and persecuted.
It also seems as though the author of the letter sees the term "running away with the victory" as some sort of derogatory term. As if the author of the Globe article was saying she "stole" the race because she was from another country (admittedly that is considered a power in our sport). The author of the Globe article was simply pointing out that her victory was very large.
The kind of mental gymnastics the author of the letter has to go through to make these assumptions is remarkable, not to mention shows something pretty deep and dark about her. Hypersensitivity is absurd and this is coming from someone who is overwhelmingly liberal (myself).