Roll away the "Stone"?

I don't get the protest over the use of Dzhokar Tsarnaev's picture on the cover of Rolling Stone magazine. Presumably it calls attention to a story inside the magazine about him and his crimes. Hitler, bin Laden, Charlie Manson, the disgraced Richard Nixon and dozens of other bad guys have been on covers. What makes Tsarnaev different?

This is about journalism, people!