So you are suggesting that if a "militant Christian" like Breivik (or any Christian) runs amok, then it is the responsibility of the church and not the appropriate authorities?

No. The authorities need to intervene as well as the church. However, in a lot of countries the Moslem church and the authorities are one and the same thing. Where they are separate, like here for instance, we can have both factions intervene. Remember the Catholic church declaring that it would ex-communicate IRA killers? I do. Has anything similar been done in the name of Islam? Have any of the Islamist authorities arrested and prosecuted known killers? I don't know but would be surprised if we can find any examples of it.

Cheers

DtG