No surprise, given that we know human behavior is contagious, a female civilian was beheaded in North London. This was bound to occur. It might not have if online media had been more circumspect in covering the murders of journalists by the Islamic State.
In The Washington Post, Abby Phillip reports:
"The attack [by a 25-year-old suspect] occurred in the middle of the day, around 1:00 p.m., in the residential neighborhood, and police sought to allay fears that it might be related to terrorism." Here is that WaPo article.
Researchers have proven that we humans are wired - mirror neurons - to affect each other cell by cell. Not only is no man an island. No man can isolate from the influence of other humans. In the online video coverage of the beheadings, it was impossible not be get caught up in the force field. Some with loose wiring might have easily gotten the idea that beheading others could be a very engaging activity.
In these troubled times the media have to review the possible consequences of the chase after high traffic numbers.