There is that aspect as well - especially the Revolutionary Guard but I was referring more to smaller factions along the lines of the restart movement, etc. I'm not sure with some of them whether they have any presence in Iran versus their existence on social media, etc. though but definitely some advocate trying to bring revolution to Iran through any means possible even stuff like shooting down a civilian airliner if it could be pinned on the regime and others buy wholly into the whole religious war stuff and that God will give them victory over the US.
They seem more like a bunch of social media groups tbh. If the plane was brought down intentionally it would have to be by someone in the military, which none of the small activist groups are going to be.
Also worth pointing out that I can’t see those sort of groups being that “stupid”. They want change, but I doubt they want it by killing potentially millions of Iranians and forcing the country into a major war.
The best likelihood (assuming it was intentional, which I’m still going to go with the consensus on this - it not being so) is it would have been members of the RG.