Excerpt:
Overall, the number of people in Germany linked to radical Islamic groups rose to 37,470 in Germany in 2010, up from 36,270 the year before, according to the report from the Office for the Protection of the Constitution.
Most of those — 31,370 — were connected to Turkish groups, nearly all of them in Milli Gorus, a group whose founder advocates creating an Islamic state in Turkey.
Most worrying was the increase in numbers in "Salafi" groups that espouse an ultraconservative interpretation of Islam and have been especially successful at recruiting young people, said Heinz Fromm, who heads the domestic intelligence agency.