I posted this earlier, and then reposted it from a Dutch mirror after it was taken down as result of a "copyright claim". That claim was due to some people who objected to the content of the video contacting a musician who owned the rights to the music that was used as the background.(It's now been muted in this video—this version will still has it.)
What you need to remember is that these mobs are more dangerous than terrorists. Terrorists kill large numbers of people once in a while, but these people kill more on balance, and can destroy whole towns and countries.