I was recently part of a discussion on a language/grammar forum about how entrenched religious language is in our expressions of intense, sudden feelings (Goddammit, Jesus Christ, oh my God, etc).
As there are many expressions we use from Don Quijote (e.g. “Sky is the limit”, etc.). Should we also make that into a separate subject?
I understand your point, but I can’t imagine you seriously think the cultural and linguistic/artistic impact of Don Quixote on Western culture is comparable to that of Christianity? I don’t think anyone is suggesting we treat Christianity as truth or exalt it, but to pretend that it hasn’t had a sufficient impact on our culture and history to merit study is a hard case to support, IMHO.