The total number of rapes and connected suicide bombers are based on Iraqi math. It was probably less than 5. They tend to over estimate or exaggerate.
Ansar al Sunnah is a salafist group. They are major "players" with ties and were at one time under the umbrella of AQIZ (Al Qaeda in Iraq). They post a lot of videos of their activities. All most forgot; they claimed responsibility for the DFAC (dining facility) suicide bombing in Mosul.
http://www.wat.tv/video/ansar-al-sun...irf2_ijd3_.htm