For Holly Carey, the Gospel of Mark is said to be a "bleak or even 'black' Gospel" because it is
Carey therefore directs the focus away from the emphasis on the death of Jesus as if that focus alone explains its dark tone:i.e.. a Gospel which has as its primary focus the suffering and death of Jesus—both Larry and I believed that this was an unfortunately one- dimensional way of reading the story
But .... the view of Mark as a "bleak or black" gospel does not rely on its focus on the death of Jesus. Rather, that dark atmosphere is there from the outset in the interactions between Jesus and others -- e.g. his wielding of power in threatening-looking ways and not even attempting to console confused bystanders that he is on their side, his aloofness and aura of dangerous power so that the looming expectation of his own death brings to mind awesome unseen powers that must be at work to bring that about, and its beginning with Jesus being possessed by a strange power driving him into the wilderness to be with wild animals... these are the sorts of elements making it discomforting reading.Instead, this is an attempt to swing the proverbial pendulum back the other way somewhat—from an almost exclusive focus on the cross to a more balanced reading of the narrative that seriously takes into account its more positive elements.
As for the term "gospel" itself, it is worth keeping in mind, as per Crossan, that the word comes from Roman imperial propaganda. If the gospel opens with that "news" then it draws to a close with a mock Roman triumphal procession to Golgotha.
Irony and darkness pervade.
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Carey, Holly J. “‘Is It as Bad as All That?’: The Misconception of Mark as a Film Noir.” In Mark, Manuscripts, and Monotheism: Essays in Honor of Larry W. Hurtado, edited by Chris Keith and Dieter T. Roth, 3–21. Bloomsbury Academic, 2015. https://books.google.com.au/books?id=VA10BgAAQBAJ.