Assassination by crowd cover?
The working theory is:
Saudi elements hostile to MBS and his reforms were supposed to get some guns in order to knock off MBA upstairs at the Four Seasons.
I think you know The Four Seasons is owned by the Saudis.
The Wahabbi team supporting MBA discovered that their khuffar American gun salesman was an informant:
They did not hit their political MBA target.
The crowd spraying was intended as a police diversion, a very special environment in which the more targeted upstairs killing could occur.