I call that Darwinism at work: The author of this surprise disqualified itself for any job that requires trust or at least a minimum of cultural sensitivity [1]; the users of this disqualified themselves from any work that requires attention to detail (like actually reading the code of libraries used or at least checking the issue tracker).

[1] I live in a country that is 97% Muslims. For most here, Christmas means at most the beginning of "white, European tourist season". My SO thought until 2 days ago that Europeans simply have a week long warmup to the new year celebrations...