These "insurgents" were angry and felt the need to "retaliate" for the arrest of their leader by...slaying Buddhists? For the record, nearly 90% of the inhabitants of Pattani, where the murder took place, are Muslims; this may perhaps -- just perhaps now -- shed some light on, not only the identity of these "insurgents," but the sort of leader they may have had ("overthrow the infidel government!"), and their motives (implement sharia). Stories [1] like this lead to such surmisings.

"Buddhist couple killed in Pattani," from [2] The Nation, January 27:

Pattani - A Buddhist couple were killed in a drive-by shooting in this southern border province Tuesday morning, police said.

Police said Mas Jannual, 39, and his wife, Pen Prommanee, 41, were shot dead on a village road in Khuan Pradu village in Tambon Na Pradu in Khok Pho district at 9:30 am.

Police said the couple were riding home from their rubber plantation and were attacked by a pillion rider.

Police believe the two attackers were insurgents who launched the attack in retaliation against the arrest of their local leader recently.