Press TV is the state broadcasting propaganda arm of the Islamic Republic of Iran. Their raw footage of a Muslims Against Crusades demonstration in London on the tenth anniversary of 9/11, burning the American flag, is presumably meant to show off the unbeatable revolutionary power of Islamism on the march.
Hopefully, it will serve a warning to those who are not quite resigned to the subjugation of Western civilization to fanatical lunatics. These people are not a tiny lunatic fringe. They are simply the most vocal leaders of a jihadist movement that numbers in the millions.