Nigerian jihad leader misunderstands Islam, says "I enjoy killing anyone that God commands me to kill the way I enjoy killing chickens and rams"

How is it that Shekau studied Islam at the feet of Islamic clerics and yet did not emerge with the idea that it was a beautiful Religion of Peace? Why is this exact same misunderstanding of Islam so prevalent among Muslims, including clerics, worldwide? Why does no one in the mainstream media ever care to ask such questions of Muslim spokesmen in the U.S.?

"Shekau leading Boko Haram from the shadows," from AFP, January 28 (thanks to Clark):

KANO (AFP) – Abubakar Muhammad Shekau was once thought to have been killed, but has re-emerged to lead Islamist group Boko Haram from the shadows as it carries out a bloody onslaught in northern Nigeria.
Very little is known about Shekau, but this week he appeared on YouTube, threatening more attacks and saying Boko Haram was responsible for the January 20 violence which killed 185 people in Kano in reprisal for the arrest and torture of its members.
Aged 43, he was born in a farming village also called Shekau in northeastern Yobe state.
He moved to the nearby city of Maiduguri, Boko Haram’s base, about a decade ago, according to sources familiar with the group.
Shekau studied theology under local clerics in the Mafoni area of Maiduguri and enrolled in a government-run school for Islamic studies.
He is often shown in photos wearing a keffiyeh and seated next to an AK-47, his face intense....
The voice said to be Shekau in the message posted on YouTube on Thursday said “we attacked the security formations because our members were arrested and tortured. Our women and children have also been arrested.
“They should know that they also have wives and children,” he said. “We can also abduct them. It is not beyond our powers.”
In another part of the message, he says, “I enjoy killing anyone that God commands me to kill the way I enjoy killing chickens and rams.”