What makes Islam unique among major world religions is that its founder espoused warfare and elevated the status of a soldier in a religious sense.  Contrast that Jesus, whose birth we will soon celebrate.  Jesus scolded, not praised, those who took up the sword, even his own disciple Peter who fought the Roman soldier arresting him in the Garden of Gethsemane.   

The dual nature of the Muslim faith, a discipline inner spirituality, combined with an outward aggression and the objective of  domination is a challenge to all societies which treat all faiths as if they are similar in nature.  They are not.   

Winston Churchill, the same luminary who foresaw the outcome of Chamberlain's compromise with Hitler, also foresaw the risks posed by the Islamic cult.  "the Mohammedan religion increases, instead of lessening, the fury of intolerance.  It was originally propagated by the sword and, ever since, its votaries have been the subject    ...to this form of madness."