"Militants chase an 18-year-old boy in to a mosque and shoot him. Imagine the outrage if this had been done by security forces," Abdullah wrote on micro-blogging site Twitter.
Suhail Ahmad Sofi was shot dead by militants in Sopore town last night as he was coming out of a mosque after offering night prayers.
Sofi was believed to have been killed for helping security forces in organising sports events, which had helped in keeping youth away from disruptive activities after 2010 summer agitation in the Valley.
"I can accept the anger directed against us for excesses by security forces but only from people willing to condemn such killings," he said.
The Chief Minister said the hypocrisy was evident from the reactions on his Twitter timeline to the killing of a youth by CRPF personnel last week and lack of any reaction to Sofi's killing.
"Want to see the hypocrisy of selective outrage? Compare reactions on my TL (timeline) today to those exactly a week ago," he added.