The more I read about the supposed plot in the US to kill the Saudi ambassador the less clear it becomes, a piece by Gareth Porter:
“On May 24, when Arbabsiar first met with the DEA informant he thought was part of a Mexican drug cartel, it was not to hire a hit squad to kill the ambassador. Rather, there is reason to believe that the main purpose was to arrange a deal to sell large amounts of opium from Afghanistan.
In the complaint, the closest to a semblance of evidence that Arbabsiar sought help during that first meeting to assassinate the Saudi ambassador is the allegation, attributed to the DEA informant, that Arbabsiar said he was “interested in, among other things, attacking an embassy of Saudi Arabia”.
Among the “other things” was almost certainly a deal on heroin controlled by officers in the Islamic Revolutionary Guard Corps (IRGC). Three Bloomberg reporters, citing a “federal law enforcement official”, wrote that Arbabsiar told the DEA informant he represented Iranians who “controlled drug smuggling and could provide tons of opium”.
Because of opium entering Iran from Afghanistan, Iranian authorities hold 85 percent of the world’s opium seizures, according to Iran’s Fars News Agency. Iranian security personnel, including those in the IRGC and its Quds Force, then have the opportunity to sell the opium to traffickers in the Middle East, Europe and now Mexico.
Mexican drug cartels have begun connecting with Middle Eastern drug traffickers, in many cases stationing operatives in Middle East locations to facilitate heroin production and sales, according to a report last January in Borderland Beat.
But the FBI account of the contacts between Arbabsiar and the DEA informant does not reference any discussions of drugs. “