David, you quote others as saying "multiculturalism has failed". That is a nonsense statement, because multiculturalism is not an experiment; it's not something we try to see if we like it. It's a fact of life. The world is multicultural; Europe is multicultural; Britain is multicultural, since the Anglos and Saxons and Normans.

It's how it is. And in the modern age, with communications and transport so easy, cross-border movement is high. Sure, when large numbers of people move around, you get some bad ones amongst them too. And you get some brilliant ones; and many hardworking ones. You don't penalise the 999 good ones to save yourself from the one bad one. You have to be more intelligent than that.

Certainly more intelligent than using statements like "Afghanistan and such places". Need I remind you that one of the people killed in the recent London bombings was a young Afghani professional who had fled his home country to avoid the Taliban? Sweeping statements are not arguments for your cause.

Must try harder.