I agree with others here that regime really needs to go but I of course share your fear of what could happen to Iran once the central government is weakened. Currently there are multiple tiers of special forces keeepinf various groups in check, however once this is gone, things could get ugly.
I worry about my family living there, we have been having a hard time time reaching there since the attacks started and there is no way of telling what is going to happen next.