From a reader:

Hi Jonah,
Khamenei has drawn the line in the sand – If the Iranians back down – there will be disappearances and murders in the dead of night, these bastards are not going to let the protesters off. If Mousavi backs down – he was a fraud all along. Tomorrow we will know. If the protests continue after Fridays prayer meeting, with or without Mousavi, the Rubicon is crossed and Iran will have a violent revolution which will end in Khamenei and the rest of this thugocracy have a hair cut at neck level. If the protesters back down they shall meet their ends in the dead of night. Like or forefathers, they must hang together or they will surely hang separately.