Sean Gabb tries to get everyone to calm down and think things through:
There have been large Moslem communities in this country since the 1960s. In this time, fewer than a hundred people have died in specifically Islamic terrorist attacks. I know that I am ignoring the death toll in New York and Madrid and Paris. But I am discussing my own country, and, even if there is a large attack in London, it will not compare in its nature with the Sinn Fein/IRA insurrection.
Doubtless, the large number of Moslems settled here brings other problems. But they have no territorial demands against us. They remain attached to their countries of origin. Many retire to these countries. They often see their stay in this country as temporary. Their religious leaders are more forthright in condemning terrorism than the Irish Catholic hierarchy ever was. Most of them do not want to kill us. Those who want to convert us believe they are doing us a favour. By the standards of our own recent past, the Moslem threat – so far as it really exists – is trivial.
Read the whole thing. He explains why imposing universal surveillance won't work.