Bill Kristol: Liberals owe dead cops a protest movement because unarmed black teens got one
Bill Kristol speaks to ABC News on Dec. 21, 2014. (Screenshot)

Weekly Standard Editor Bill Kristol on Sunday suggested that liberals should start a movement to protest against the killing of two slain police officers in New York City in the same way that they had reacted to the ongoing trend of unarmed black teens being killed by law enforcement.

On Saturday, NYPD Officers Wenjian Liu and Rafael Ramos died after being ambushed and shot to death in their police car. The suspect, who later took his own life, had expressed anti-police sentiments on social media.

During a discussion panel on Sunday, Kristol echoed the sentiment of people like former New York City Police Commissioner and convicted felon Bernard Kerik, who said that New York City Mayor Bill de Blasio had "blood on his hands" for trying to reform the NYPD.

"Well, it's terrible what happened," Kristol remarked. "And I hope liberals show as much concern about Officer Ramos and Officer Liu as they did as they did about Mr. Garner and Mr. Martin. We'll see."

"I think de Blasio said some really foolish things," he continued. "I'm not blaming him obviously for the killing. But he really now needs to not just say, 'I'm for everyone coming together.' He needs to say, 'I was wrong, I was wrong when I attacked the police in such a general way.'"

Former Vermont Gov. Howard Dean (D), however speculated that the shooter was not part of a larger trend.

"I think this guy was crazy more than this was a revenge for something," Dean said.

Watch the video below from ABC's This Week, broadcast Dec. 21, 2014.