AdvertisementFrom German Teen To ISIS Jihadist: A Father's Struggle To UnderstandDecember 03, 2014Soraya Sarhaddi NelsonfacebookEmailAlfons R. of Hamburg, Germany (shown in this undated photo), converted to Islam at age 17. Later, he went to Turkey, then Syria, to join ISIS. He was killed this past summer. (Courtesy of Manfred Karg)