Is Barack Obama an Islamic apologist? He has a history of it, and the above tweet speaks volumes. ISIS or ISIL is following the vision Muhammad laid out for his apostles. And yes, Islam does teach people to massacre. Here is an excerpt from one of my earlier blog post.
Abu Bakr organized the invasion of Syria [Syro-Palestine] which Muhammad had already envisaged. He gathered tribes from the Hijaz, Najd, and Yemen and advised Abu Ubayda, in charge of operations in the Golan, to plunder the countryside, but due to a lack of adequate weaponry, to refrain from attacking towns. Consequently, the whole Gaza region up to Cesara was sacked and devastated in the campaign of 634. Four thousand Jewish, Christian, and Samaritan peasants who defended their land were massacred. The villages of the Negev were pillaged by Amr b. al-As, while the Arabs overran the countryside, cut communications, and made road perilous. Towns such as Jerusalem, Gaza, Jaffa, Cesarea, Nablus, and Beth Shean were isolated and closed their gates. In his sermon on Christmas day 634, the patriarch of Jerusalem, Sophronius, lamented over the impossibility of going on pilgrimage to Bethlehem, as was the custom because the Christians were being forcibly kept in Jerusalem: “not detained by tangible bonds, but chained and nailed by fear of the Saracens,” whose “savage, barbarous and bloody sword” kept them locked up in town….Sophronius, in his sermon on the Day of the Epiphany 636, bewailed the destruction of the churches and monasteries, the sacked towns, the fields laid waste, the villages burned down by the nomads who were overrunning the country. In a letter the same year to Sergius, the patriarch of Constantinople, he mentions the ravages wrought by the Arabs. Thousands of people perished in 639, victims of the famine and plague that resulted from these destructions.
The countryside [in Syro-Palestine, Iraq, Persia, and Armenia] suffered constant razzias, while those who escaped the sword swelled the contingents of enslaved women and children, shared out among the soldiers after the deduction of the fifth [share of the “booty”] reserved for the caliph.
According to [the Muslim chronicler] Baladhuri (d. 892 C.E.), 40,000 Jews lived in Caesarea alone at the Arab conquest, after which all trace of them is lost.
Islam is a supremist ideology. If ISIS believes another Muslim isn’t following the dictates of their prophet, they’ll make damn sure he does, or else.