For too long, the immensity of Islamic State’s propaganda machine has obscured a rational understanding of it. The organisation’s media strategists are producing high-definition depictions of the most abhorrent brutality on an industrial scale, ensuring that jihadism is digitalised and brought firmly into the 21st century. The days when we saw grainy video footage played on Al Jazeera and propaganda was limited to stagnant speeches made by terrorist leaders are long gone.