When are we going to start arresting imams for preaching hatred and violence toward non-Moslems? The Koran and the sayings of Muhammad which are considered sacred text by all imams are loaded with commands to kill non-Moslems, make war on them, slice their heads off, etc. If you read the Koran, you will see that it is incitement to violence,  and that is precisely way that all the Moslem terrorists have understood it. The head of ISIS, for example, has a PhD in Islamic law from an Islamic university. Ayatollah Khomeini, one of the most learned Islamic religious authorities in the world during his time, said that it is the duty of the military forces of the Islamic Republic of Iran to spread Islam to the rest of the world, that is, by military aggression. The most popular manual of Sharia law, "Reliance of the Traveller", defines jihad as "to war against non-Muslims". You can't get plainer than that!