Also, they know the alternative is that they will be dragged in the streets and killed. Iran is long past the point where a revolution can be peaceful and conciliatory; if the regime falls, there will be a redde rationem where most people connected to enforcement and decision-making will be very summarily judged by the people they abused for decades.
>>jacque+sk
The whole Middle East has been battered ever since the end of WWII, in one region or the other, and the wave of conflict is nowhere near the end.