It was reported that a sports commentator is criticized being racist for calling Japan "Land der Sushis". According to this article, he said:
Es wäre sein erster Treffer für 96 gewesen. Den letzten hat er im Land der Sushis geschossen.
As a second language learner, I have difficulty figuring out the implicit nuance besides its literal meaning: 🍣 (though I feel a little weird seeing Sushi in plural). How and to what degree does the phrase sound racist (or pejorative) in this context? Is it associated with some typical discriminatory template, or is the metonymy inappropriate for the occasion?