Because the shia are Munafiqiin..
Sunni militants have seized another town in Iraq's western Anbar province - the fourth in two days.
Fighters of the Islamic State in Iraq and the Levant (Isis) captured Rutba, 90 miles (150km) east of Jordan's border, officials said.
They earlier seized a border crossing to Syria and two towns in western Iraq as they advance towards Baghdad.
The insurgents intend to capture the whole of the predominantly Sunni Anbar province, a spokesman told the BBC.
Isis on the Euphrates
Rutba is strategically placed on the main road between Baghdad and Jordan.
It is the fourth town in what is Iraq's largest province to fall in two days to the Sunni rebel alliance, which Isis spearheads.
On Saturday the militants said they had taken the towns of Rawa and Anah, along the Euphrates river.
And Iraqi officials admitted Isis fighters had also seized a border crossing near the town of Qaim, killing 30 troops after a day-long battle.
Source: http://www.bbc.com/news/world-middle-east-27960142