There has been some overt acts like the shooting of the head of the publishing company who published "Satantical Verses". The publisher did survive the assasination attempt. I man mistaken for a journalist who had made fun of Islam was severely molested by a gang of Pakistan youth.
However, mostly there have been a large numbers of murders, stabbings and gang rapes perpetrated by muslims against non-muslims. If their reason was islamic? Who knows? Many of the rapes probably are related to Islamic reasoning I would venture to guess.
Just during this Ramadan, a young girls was found murdered in her dormitory room by a Somali man. And a few days ago a 15 year old girl was abducted by one Iranian and three Kosovo Albanians and gang raped for hours in my little town. This August, a Somalian man went berserk on a tram and stabbed several people, killing one boy who was blind, and thus was unable to get away.
Personally I have been beaten up by a gang of Kosovars, and a close friend of mine was raped by a Somali. Such events are too commonplace to even warrant mentioning.
Add to this that the good doctor Zawahiri tends to pop up from time to time in is tapes and threaten Norway, there is a lot of anger and resentment building up.