Actually, Black Elk was baptized as a Roman Catholic in about 1915 about 18 years before the famous book. Surely the author knew that since Black Elk was a lay Catholic missionary to the Sioux from the time of his baptism to his death in about 1945 as a 1990s biography revealed. When that biography was written, Black Elk's surviving daughters were quoted in the New York Times Book Review as expressing gratitude that his Catholicism had been recognized.
#9 is less important than most of the others.
Whether or not Black Elk was pagan or Catholic is irrelevant to me.
Black Elk was a warrior.
Would you care to explain why #9 is less important than the others? No one thinks we shouldn't share, but there's a right way and a wrong way to share.