Police Ensure Safety of Black Bloc

Watch this video from 6:30 to 8:10, here is proof that police were instructed to let the Black Bloc continue with their task of breaking windows. A citizen tries to stop a hooligan; then a police officer and undercover agent intervene to help the hooligan get away.



If you also look at these other videos a picture starts to form:
Here a looter is tackled by a citizen, then an undercover intervenes to help the looter get away: http://soulwork101.blogspot.com/2010/07/looters-assistant.html

Meanwhile, just around the corner from these incidents, dozens of uniformed police stand down and allow the carnage to occur:
http://soulwork101.blogspot.com/2010/07/police-allow-black-bloc-carnage.html

So what do you think; were police trying to stop to Black Bloc or was the 'destruction on the streets' staged for our enjoyment?