The writer is using these sentences as an introduction to make an initial point.
They sound convoluted to me as if he is picking a phrase here and there with the result being total confusion.
They're supposed to. The author isn't specifically saying he agrees with any of those points. His point is to mimic the cacophony between the multitude of groups that claim the Bible as their sole authority, but then draw completely divergent conclusions, resulting in utter confusion.
Thank you for your answer but it still doesn’t make sense to me and seems disingenuous.
Do you not think he should take actual scripture that shows differing ideas on the same subject if, in fact, they are there? To not do that might dissuade another from attempting to learn. If they take the writer’s statement as fact, which it isn’t, they may believe the Bible is full of inconcistencies and discount it.