Sadly, I don't share your conviction that the police/army would have arrested everyone on the spot, any more than they did with these wankers.
The answer obviously is PC. Hate is hate, regardless of skin colour, and it DOES irritate the piss out of me to see authorities pandering to the religious sensibilities of one group. This should rightly be a secular country, and fuck christians AND muslims who can't seperate their right to peacefullly practice their own beliefs without insisting others adhere to their cultural code. Having said which, I live in a heavily muslim area, and most of em live and let live like most indigenous brits do. its the gobshite minority that cause all the bother.