For I testify unto every man that heareth the words of the prophecy of this book, If any man shall add unto these things, God shall add unto him the plagues that are written in this book:
“...the words of the prophesy of this book..”
This is from Revelation 22 and is self-referencing. “This book” is the book of Revelation. This is the scope of the curse which addresses adding to or taking away from the words of the book, and then promoting the altered version as the true version. Such a person can never be saved. This is an unpardonable sin, as is blaspheming the Holy Spirit.
People disagree with scripture all the time, but that is not changing the words. That is ignoring them, not understanding them. BO’R doesn’t want to attribute the bible’s faithfully recorded sayings to Jesus. I didn’t either before I believed they were true and faithful which occurs when someone believes in the Faithful and True. (Revelation 19:11).
But I will add that one who is so fueled to actually write a book disputing the truth of scripture is more than an agnostic.