“The number of Islamic extremists in the country is growing rapidly,” The head of Germany's domestic intelligence agency has said. Hans-Georg Maassen explains that his agency estimated that about 6,300 people in Germany are supporters of a fundamentalist strain of Islam known as Salafism. Maassen said that the number of Salafis could increase to 7,000 by the end of this year, compared to about 3,800 that was three years ago. He added that extremist strands of Islam provide disaffected young people with a sense of belonging and purpose that allows them to hope they'll go "from being underdogs to top dogs." Officials have estimate that about 450 Salafis from Germany have gone to join extremists groups fighting in Syria and Iraq.