It’s a protracted insurgency. It’s war, regardless of how much people want to deny it:

Britons trying to remain optimistic note that they survived and eventually defeated Irish nationalist terrorism not all that long ago. But this is a flawed analogy. In the first place, at any given time during the Troubles, the number of active Provisional Irish Republican Army terrorists seldom exceeded a hundred. Moreover, the PIRA was a “normal” terrorist group with rational political motives, not a religiously-motivated death cult, and it generally eschewed killing civilians for its own sake. Indeed, atrocities like the 1987 Enniskillen attack, which murdered 10 innocents, proved a black mark for the group, even among staunch republicans. Therefore, comparing the PIRA to ISIS and its murderous Western wannabes isn’t much help to practical counterterrorism.

That said, if Britain doesn’t soon devise tough countermeasures to its vast domestic jihadism problem, many of its cities may come to resemble Northern Ireland a generation ago, with armed soldiers in battle gear patrolling the streets as “aid to civil power” while enforcing frequent security checks on average citizens with the aim of stopping terrorists.

In their historically recent unwillingness to allow Britons to defend themselves (appalling, considering that we inherited our notions about the Second Amendment from ancient English Common Law), the contradictions of their multi-culturalism will become untenable.

[Update a few minutes later]

Counterterrorism lessons from America’s Civil War:

Destroying ISIS, al-Qaeda and other Muslim terror groups is not particularly difficult, far less difficult than Sherman or Sheridan’s task during the Civil War. It simply requires doing some disgusting things. Western intelligence doesn’t have to infiltrate terror groups, tap phones, mine social media postings and so forth (although these doubtless are worth doing). Muslim communities in the West will inform on the terrorists. They will tell police when someone has packed up and gone to Syria, and when he has returned. They will tell police who is talking about killing westerners, who has a suspicious amount of cash, who is listening to broadcasts from Salafist preachers.

They will tell western security services everything they need to know, provided that western security services ask in the right way. I mean in Phil Sheridan’s way. Like the victorious Union generals of the Civil War, the West does not have to be particularly clever. It simply needs to understand what kind of war is is fighting.

Yes, ultimately, the only way to victory is to make them fear us. As Mark Steyn has said, the question is not “Why do they hate us,” but “Why do they despise us”? It is because they have no respect for us, and given the behavior of the “elites,” it’s hard to blame them.

[Early-afternoon update]

In the face of terror, Londoners told to “Run, Hide, Tell.”

Contrast this with the London of eight decades ago.