Why did CNN blur out the faces of "secret" federal agents arresting protesters in Portland?

Gizmodo

"CNN aired a viral video on Sunday of U.S. secret police kidnapping people in Portland, Oregon—a tactic that White House officials say could be coming to several other cities in the coming weeks," reports Matt Novak. "CNN made an odd journalistic choice to blur the faces of the police in the video, but CNN’s Jake Tapper took to Twitter yesterday to insist it’s all a big misunderstanding. The only problem with Tapper’s explanation? This isn’t the first time his show has obscured the faces of Trump’s goons to keep them anonymous."