As vicious and barbaric as murder by fire is, it is not anathema to Islamic teachings. As much as Western leaders whine and cry over the atrocities perpetrated by jihadists, they cannot show, through texts and teachings that Islam is the religion of peace they so desperately want it to be. As long as the Islamic State can base their actions on the Qur'an and the hadiths of Muhammad no one is safe, especially Muslims seen as "not Muslim enough".
Here is but one story from Muhammad’s conquest of Khaybar that illustrates how what the Islamic State did is in line with Islamic teachings: “Kinana b. al-Rabi`, who had the custody of the treasure of B. al-Nadir, was brought to the apostle who asked him about it. He denied that he knew where it was. A Jew came (T. was brought) to the apostle and said that he had seen Kinana going round a certain ruin every morning early. When the apostle said to Kinana, ‘Do you know that if we find you have it I shall kill you?’ he said Yes. The apostle gave orders that the ruin was to be excavated and some of the treasure was found. When he asked him about the rest he refused to produce it, so the apostle gave orders to al-Zubayr b. al-Awwam, ‘Torture him until you extract what he has,’ so he kindled a fire with flint and steel on his chest until he was nearly dead. Then the apostle delivered him to Muhammad b. Maslama and he struck off his head, in revenge for his brother Mahmud.” (Ibn Ishaq 515).
There is also this hadith, in which Muhammad says: “Certainly I decided to order the Mu’adh-dhin (call-maker) to pronounce Iqama and order a man to lead the prayer and then take a fire flame to burn all those who had not left their houses so far for the prayer along with their houses.” (Bukhari 1.11.626). Thanks to Robert Spencer for the above quotes.
There are many other passages and traditions that uphold the burning to death of those who went afoul of Islamic doctrine. The West, in its infinite wisdom feels like it has the responsibility to define what Islam is, mostly to deflect the uncomfortable aspects which belie the "religion of peace" moniker assigned by apologists and those who refuse to see the truth of Islamic theology.
Unless and until the West begins to talk truthfully about Islamic teachings that uphold this kind of violence, and hold Islamic leaders responsible for this kind of behavior, it will continue and grow. There is nothing safe about ignoring the china shop bull, and concentrating only on cleaning up after the destruction serves only to blind us to the reasons the carnage happened in the first place.
Many more will die at the hands of Islam. 1400 years of history prove this as Islam marches again across the globe. Will we have the backbone to stand up for what is right, or will we lay down and die, all to make Islam feel loved and respected? The answer is rapidly coming at us, like the light at the end of the tunnel that turns out to be a careening, oncoming train.
The clash of civilizations is coming and we will be forced to choose sides. Liberty vs sharia, democracy vs theology, laws of man vs laws of Allah. May God protect us from the scourge that is Islam.