Generally speaking, which ever group actually did manage to perform the hack will try to point blame elsewhere to try to confuse the investigators as to who actually committed the crime.
As for complaining about other countries terror tactics and methods of warfare.....as an American, I want to point out that we as Americans did a very nice job of using terror against the British (remember the Boston Tea Party?) and using snipers up in trees (yes Virginia, we did it first, not the Koreans). Had Benedict Arnold not changed sides during the American Revolution, he was the inspiration for the Revolutionary Army to use the sniper tactic. Also, wasn't it American Revolutionist that dressed up as Native Americans to try to point the blame elsewhere?