while crazy people who happen to be Christians ( and who can match or exceed their Muslim counterpartsatrocity for atrocity) are not styled "Christian Extremists"?

How soon we forget the sectarian dived that still lingers in Northern Ireland. The divide is along religious lines, and you can't say the agitators aren't using it as an excuse.

IS most definitely uses religion and enforces is wherever they are in ascendency. The clue is in the name IS. And what is the definition of a caliphate?

If claiming to be a religious movement and impressing it on anyone who they meet by means of force is not a highjack then please publish your dictionary.

BTW extremes (dracaonian if not violent) of religion are called fundamentalist and the word has been used on Hebredian Protestant communities, and even gun toting individuals of the Jewish community in Israel. Mind you I can't imagine a fundamentalist Buddhist..........