The articles by Khashoggi were probably more than sufficient for MbS: https://www.washingtonpost.com/news/global-opinions/wp/2018/10/06/read-jamal-khashoggis-columns-for-the-washington-post/
MbS is trying to crush all opposition against him, but the royal family is divided and fears for the stability of Saudi. It is not unlikely that there will be more visible opposition in Saudi from one or more of the tribes. Here is a list: https://en.wikipedia.org/wiki/Tribes_of_Arabia