I wouldn't call Varg Vikernes crazy. This is his story on the murder from his perspective: http://www.burzum.org/eng/library/a_..._story02.shtml
Actually there have been quite a lot of church burnings in Norway, as an act of the Black metal society. Someone tried to burn the church I'm living 100 meters from unsuccessfully some years back. And this is only a place with about 2500 inhabitants.
In regards of Black Metal I'm not fond of very much of it. I prefer grindcore or death instead. Though there are some good songs, and i like much of Summonings songs despite their heavy use of lamer synths.