The left knows that the muzzies will use anything, big or small, real or perceived, to use as an excuse to murder innocents.
Should they use the book burning as an excuse to attack us here the left knows full well that the citizens will not tolerate it and will demand Obama resign or be impeached for failure of his sworn duty to protect us. Even worse should it be found that the attackers entered here by crossing the southern border illegally.
The left realizes that the long term affects of such an attack will be the reduction of their party to permanent minority status. No democrat will be elected at any level. They will be branded as the party that defends terrorists.
It would take 20 or 30 years for any democrat to be seen as someone electable and by then all their entitlement programs would have been dismantled.
The progressive humanists never get worked up over flag or Bible burnings or the murder of Christians and Jews. Muslims are their darlings now. You are right. It is all about the revolution. The Progressives are at war with a God centered America. So are the Muslims. The Muslim God preaches jihad. The Christian God is love.