The most disturbing element of the attack for many people is Mr. Brunerie's link to the extreme-rightist and neo-Nazi groups that operate in the shadows of French political life.
A closer listen to their music also reveals another disturbing element of our contemporary experience, one for which they are not at fault: paternal absenteeism and its impact upon emerging generations.
Samer Muscati, a Middle East researcher for the New York-based Human Rights Watch, said that one "disturbing element" of the trial was the way in which "the government is waging a public relations campaign against these activists and using them as an example".
Like millions of others, Zimbardo was deeply shocked by what he saw, but for the professor emeritus of psychology at Stanford University, California, there was a disturbing element of familiarity.
This is the Holocaust as chick-lit, bringing a disturbing element of sex and voyeurism.
The Premier League said in a statement: "A disturbing element of increased pyrotechnics has been the involvement of children.
Anonymous messaging apps, including Yik Yak, Whisper and Secret, have become a disturbing element of the cyber landscape.
Among the most disturbing elements of Sessions' record revealed by the transcript is his behavior as a U.S. Attorney in Alabama, where he prosecuted three black civil rights activists for voter fraud.
One of the most disturbing elements of the ongoing refugee crisis is the fate of unaccompanied children.
And that was the way fans felt before the Colts were hammered last Sunday by the Houston Texans, 34-7, in a performance notable for one disturbing element: the backup quarterback Kerry Collins, called in less than a month ago when it became clear Manning might not be available, was not even the Colts' most pressing problem.
