Mossad has literally admitted to that.

Let me even quote an Israeli newspaper:

> On December 29, what is dubbed the Mossad X/Twitter account in Farsi encouraged Iranians to protest against the Iranian regime, telling them that it is literally physically with them at the demonstrations.

> “Go out together into the streets. The time has come,” the Mossad wrote. “We are with you,” it added. “Not only from a distance and verbally. We are with you in the field.” [...]

> Foreign actors had armed Iranians to help them fight against the regime’s forces being used to crack down on and oppress protesters, Channel 14’s Tamir Morag reported Tuesday. Iran’s foreign minister retweeted the report for his own agenda.

https://www.jpost.com/middle-east/iran-news/article-883524

Iranians don't NEED any external motivation to riot. The current Shia Theocracy that runs Iran is completely insane and incompetent and cruel.