Further, at least in this case the statement is transformed from “highly controversial” to “straightforwardly wrong” by its insertion into this context. The idea that people with different ancestry might benefit from different diets is not, so far as I am aware, a thing that “social justice warriors” call racism or pseudoscience. (Though I expect some of them do. For any reasonably large group, you can find some members who do pretty much any crazy thing.)
Further, at least in this case the statement is transformed from “highly controversial” to “straightforwardly wrong” by its insertion into this context. The idea that people with different ancestry might benefit from different diets is not, so far as I am aware, a thing that “social justice warriors” call racism or pseudoscience. (Though I expect some of them do. For any reasonably large group, you can find some members who do pretty much any crazy thing.)