The point is, that although the whole World saw this thug hit this woman, he's escaped without punishment
Watch the film clip and count the times he hit her, then look at the picture of her injuries. Shes got two injuries. which then leads on to several interesting questions IMHO
He warned her off at least 3 times before he clumped her, and to be fair he is perfectly entitled to defend himself, especially in the circumstances as they were, I have to say leaving at the first or second time of asking would have sorted the incident out before it started.
The real issue in all of this is how our civil liberties are being eroded, not so much by the Police, but by anarchists who show up at demonstrations set on violence and mayhem.