I'd think 'the west' would steer clear, and after Syria who would beleive us?
israel though, I'd think they have weapons inside Iran, ready to distribute, if enough people protested.
Probably looking for a trigger event, which would probably be pretty messy.
I remember there were talks, theories and scenarios about partitioning Syria and even Iran.
Though it sounds like a huge and precarious enterprise, perhaps it could lead to a way to solve, or at least try to, the issues created post WW1.
Israel has lots of support, all things considered, and seems to have relatively good contacts with a number of minorities. To go back to Syria, the fall of Assad was the perfect time for either a new moderate and progressive government (Jolani claims to be that guy, but is he really? we will see I guess) or a redistribution, balkanisation, of the country. So far Syria seems to be going for the first option. So far.
But contrary to Iran, Syria was already divided by years of civil war, so a good chunk of the work was already done.
Iran however still is "united" to some extent and the Mullahs still retain a significant amount of power and influence on the population.
Another main difference is the kind of power being involved. Assad's power wasn't political, it was dictatorial, autocratic and generational; in itself Assad's power was based on nothing.
Iran however is based on religion, and religious power is significantly harder to break than anything else. Even under the most repressive, backward, "neandertalesque", religious regime you will have compliant and obedient followers. As if religious oppression was preferable to any other.
What would be the trigger then... not sure removing the mullahs would be the way to go. Or at least, I am not sure that would lead to productive results.
Creating a civil war by funneling weapons and having underground resistance groups might not be the way to go either. The goal is to keep the country united, not have people mounted against one another and forced to kill one another to, potentially, reach that outcome.
Perhaps the other regional Arab countries should step up and get involved more regarding Iran. After all, Iran is an actual threat to these countries as well.