If there is a fire in a crowded theater then yelling fire is not false and is protected speech.
The threat of global jihad is real; therefore alerting citizens of the threat is not false and IS protected speech.
When that weirdo preacher in Florida announced that he intended to burn the Koran - and his announcement was met with threats from Muslims all over the world, and by appeasement/dhimmitude/submission by many politicians and bureaucrats - this proved that the threat is real and his action was useful and helpful.
Those who characterize anti-jihadists as the primary problem - as the inciters - and who excuse Muslims (and call Islam a "religion of peace"), ignore 1400 years of global jihad against Buddhists, Hindus, Zoroastrians, Baha'is, Jews, Christians, and even internecine genocide between Muslim sects. In all of recorded history, no ideology has murdered more people or enslaved more than Islam.
We should no more condemn the burning of the Koran than condemn the burning of Mein Kampf. We should no more tolerate Islam than Nazism.
And we should remember that as evil asd Nazism was, Nazism was less evil than Islam: Nazis didn't destroy any art nor routinely disfigure and enslave women or deny them an education.
True Islam and modernity do not and cannot coexist.
Only one will continue to exist in the coming decades: either the West will submit or Mohammedanism will go the way of Nazism and Marxism.