They were Palestinian Security guards who opened fire when the Jews in question failed to stop their car and entered the area without the proper permission. Israel arresting them shows they are following the directives of the right wing. The main offender shot was the son of a Right wing MK.
Wes Craven, director of 'Scream' and 'Nightmare on Elm Street', dies 76 (Haaretz)
from the article: IDF arrests three Palestinian suspects over 2011 Joseph's Tomb attack