That theory, though possible, means high ranking team of agents intoxicated a mass including their own believers and children of mullahs and IRGC.
Of course if that happens, it will leak and they will get fucked.
The Leader's intervention shred to pieces all the pathetic conspiracy theories incriminating the Islamic Republic. If intoxication turns out to be the cause, which as you said would not be mutually exclusive with numerous simultaneous instances of MPI, then my second hypothesis remains plausible: either Iran's existential zio-American enemies acted directly on their own, or used agents planted amidst public institutions.
The other hypothesis, that of a fringe grouplet of highly resourceful "Taleban-like religious extremists" in the security services with no connections to abroad acting rogue is unrealistic for several reasons:
1) How come we've never heard of such a current before? Is it supposed to have taken shape spontaneously?
2) It must have had access to highly sophisticated means allowing its members to concoct substances which medical research teams across the country have failed to identify after weeks. Needless to say, it's unlikely such a thing could take place under the radar of Iranian intelligence unless powerful foreign services involved themselves in support of these purported domestic elements.
3) You can't be this dumb to mount an operation that is all but synonymous with shooting the Islamic Republic in the foot. It's too blatantly in line with the agenda of foreign enemies. The latter have certainly been busy trying to fabricate pretexts for renewed disturbances in Iran, and this is like tailored to suit such a sinister objective. Which in turn implies that any theoretical domestic element responsible for this would have to be hostile towards the Revolution and the political order. Which again would beg the question how likely it is that such an element would have remained unnoticed by security agencies if deprived of significant foreign assistance? Not likely at all is the obvious answer.
We can also look at the issue from a different angle. Doesn't it tend to evoke episodes like the Kashmiri and Sa'id Emami affairs? In said affairs,
nofuzi networks of the highest order had been at play, using infiltrated agents to either conduct terrorist attacks against high ranking officials (Kashmiri) or, seemingly more akin to the topic at hand, commit serial killings of writers, intellectuals and retired political activists who posed no threat to the stability of the government, the goal being to have people blame Iran's security services and political leadership as well as to delegitimize the latter with the broader public. IRGC intelligence achieved to uncover the plot.
An interesting aspect in this regard is the fact that well documented analysts in Iran have spoken about the handlers of these
nofuzi networks, and identified these networks as part of the Mossad stay-behind (comparable to NATO's Gladio) consisting of infiltrators who prior to the Revolution had been secretly recruited by SAVAK (hence why in confiscated SAVAK documents they were referred to by numbers only, never by any names) and who, while claiming to oppose the monarchy, were in fact working for its security apparatus and the latter's foreign patrons. So that after the Revolution, they would infiltrate the Islamic Republic as civil servants or officials and conduct undercover spying, sabotage and false flag operations. Equally interesting is how analysts have thus underscored that these
nofuzis are being handled from abroad by Mossad and/or the likes of the CIA, via these agencies' former men of choice in SAVAK.
One intriguing name has surfaced a couple of times in this regard: Parviz Sabeti, whom some authors believe to be of crypto-Jewish, Haifan Baha'i background and who's been cited as having been in charge of Mossad's hostile stay-behind network after 1979. This is the same SAVAKi division chief who was not just infamous for his brutality, but one who deliberately left the shadows just recently, with foreign-funded Persian language media embarking on a colorful PR campaign to try and whitewash his image with those back home gullible enough to listen to their propaganda. Parallel to this, we witnessed the incidents at girls' high schools. Was Sabeti's return into the spotlight a message from the zionists? Are they intending to go all out, to consume the cover of some of their top agents in return for continued disturbances they are so desperate to engineer in Iranian society? Food for thought.
Is there a meaning to the body language?