Videos showing the torture of four people accused of carrying out Russia's deadliest terrorist attack in decades have gone viral in what analysts say is a sign of the Russian state's and society's growing tolerance for mass violence. "Torture should not exist as an incident. The police and the state will torture a terrorist today, see that this method is approved, and tomorrow they will torture an activist, a journalist, anyone else. They don't know any other way," wrote activist and investigative journalist Ruslan Shaveddinov.