How is it that an imam, trained in Islamic theology, can so misunderstand his peaceful religion?

"Family killed in name of honour," from [1] APP, June 17 (thanks to Block Ness):

SHAHDADKOT: Three persons including a woman and a child were killed in the name of honour by a group of armed men in a village near the Sanjar Bhatti Police Station, Shahdadkot district on Tuesday.

Two people, Abdul Rasheed Junejo and his 3-year-old son Rashid, were killed by a group of armed men led by Imam Bux Brohi.

According to the police report, the accused also shot and killed Junejo’s wife.

Police have arrested the accused, Imam Bux Brohi, and Abdullah Brohi for their involvement in the murders....