Plus a bunch of those killed have been Kurds or other minorities, so there's a chance the regime can at least partially polarize this on the basis of ethnicity in order to (somewhat) reduce opposition - minority rights and potential secession tends not to be popular even with more reform minded Iranians iirc

But idk. Hopefully I'm wrong, hopefully revolution occurs and succeeds, hopefully Iran ends up a free and democratic country while also giving freedom and independence to the Kurds and other oppressed minorities in the country