Going back to Tom's original post, about white people wearing Muslim dress, and widening that a little to include all people wearing Muslim dress in the UK. I think it's fair to say that some people, indeed in certain areas many people, see that as provocative. Of course Vetivert may accuse me of talking about something I don't understand, but that, unfortunately, is something I do; from speaking to white working class people whose communities have been literally taken from them by immigrants who much of the time can't even speak English.
Of course, it's their legal right to wear Muslim dress, as it is to speak whatever language they choose, but to many people those things are a statement of defiance: a kind of "this is our country now, so go get f****d". In a way, like when the Orangemen march down Shankhill road: it's their right, but also seen as an overt political statement. OK, there are many differences between the two situations, granted; but, there's enough similarity to demonstrate the point.
Looking at the last example, the problem to a greater extent is perception, and the misunderstandings that Vetivert has stated exist due to ignorance; but, that doesn't mean that there isn't a problem — a big one — and that Muslims have as much responsibility (perhaps more) than the rest of us to ensure that now we're all in this bloody mess together that we can get on. And if that means they dress a little like the rest of us, and speak our language, then that's what they should do.