Sarah, a 21-year-old new college graduate, initially didn't pay much attention when one of her classmates double-clicked on a YouTube video from a Muslim extremist and cranked up the sound. The soft voice that came out of the speaker was that of Junes Kock, the Scandinavian spokesman for Hizb ut-Tahrir, a global Islamist group that has a following in Denmark among young Muslims.
For months, Sarah and her friends had been talking about what it meant to be Muslim in Denmark. The general consensus was that it was hard. Junes Kock, in hundreds of videos online, spoke to that.