Certainly the NY Times allegations against Saudi Arabia cannot be dismissed out of hand, not after 9/11, Syria, Yemen, and Jamal Khashoggi. From Tyler Durden at zerohedge.com:
So maybe the Iranians do have much to be paranoid about. An explosive New York Times story citing multiple unnamed sources familiar with the matter details how top Saudi intelligence officials conspired to assassinate Iranian leaders — including Iranian Revolutionary Guard (IRGC) Quds force commander Qassim Suleimani — in a plot wherein the Saudis mulled using private contractors, and even approached Erik Prince, the former head of Blackwater and at the time adviser to the Trump transition team.
The discussions took place around two years before the killing of journalist Jamal Khashoggi as MbS was still deputy crown prince and defense minister, and was in the midst of ramping up intelligence operations outside the kingdom.
During the March 2017 meeting about the plan to sabotage Iran’s economy, according to the three people familiar with the discussions, the Saudis asked the businessmen whether they also “conducted kinetics” — lethal operations — saying they were interested in killing senior Iranian officials. – NYT report
According the Times report a group of international businessmen assisted then deputy intelligence chief Ahmed al-Assiri (recently sacked over the Khashoggi murder) in shopping around the plan to private contractors and Western allies, specifically the United States, and ultimately aimed to “assassinate Iranian enemies of the kingdom” and try to “sabotage the Iranian economy”.