I'm not claiming that the behaviour wasn't extreme and am sorry if that's how you read my post.
I was suggesting that ideas and values, such as demonising asylum seekers and all immigrants (especially Muslims) are becoming normalised, as evidenced by many tabloid headlines and comments on social media. To an extent, those extreme ideas are becoming the norm, although I doubt most people become thugs. The trouble is that the gormless thugs read the headlines, so their behaviour is justified in their little brains.
I loved the expression on this girl's face at today's EDL march in Birmingham. Well done, that girl!