Turkish and Kurdish Islamist groups are also active in Germany, and Turkish and Kurdish Islamists have co-operated in Germany as in the case of the Sauerland terror cell. Political scientist Guido Steinberg stated that many top leaders of Islamist organizations in Turkey fled to Germany in the 2000s, and that the Turkish (Kurdish) Hizbullah has also "left an imprint on Turkish Kurds in Germany." Also many Kurds from Iraq (there are about 50,000 to 80,000 Iraqi Kurds in Germany) financially supported Kurdish-Islamist groups like Ansar al Islam. Many Islamists in Germany are ethnic Kurds (Iraqi and Turkish Kurds) or Turks. Before 2006, the German Islamist scene was dominated by Iraqi Kurds and Palestinians, but since 2006 Kurds and Turks from Turkey are dominant.