While it *may* be true that the government in the US guarantees greater freedom of expression than the UK (discussion elided of any rights that governments may have to *give* freedoms in the first place).
In practice, however is this true? These Islamofascists demonstrated their love of terrorism in a city wherein their friends ('The Fantastic Four' referred to on one of the placards) blew themselves and a sizeable number of our citizens up - yet no-one shot them or beat them senseless.
If they'd tried this stunt in, say, New York, would they have escaped equally unscathed?
Many Muslims (including those referred to as moderate) say they work toward taking Britain into a "Eurabian" Caliphate:http://www.caliphate.co.uk/ http://en.wikipedia.org/wiki/Eurabia
The views expressed on that site don't sound too terrible at first sight (f/x tounge massively in cheek, here), perhaps, until you read more widely just exactly what dhimmitude was *really* like.http://www.dhimmitude.org/archive/dhimmitude%20of%20the%20west%20aug02.html
Doubtless 90% of views assigned to both sides may be safely discarded as conspiracy-theorist fodder, but there is still some root cause for concern.