Perry de Havilland at Samizdata sets out what won't defeat Islamic terrror. 

one approach I am quite certain does not work is candlelight vigils, weepy hashtags and a refusal to face up to who the enemy is and why they are doing what they are doing.

He makes a good point but what will?

To begin with we should do nothing to validate the belief of these losers™ that they are special. The Prevention of Terrorism Act 2005 – a piece of knee-jerk legislation that led me to begin this blog long years ago – was (and this is the least of my criticisms) a mistake in psychological terms. It dealt differently with those who murder for political reasons thus confirming their view that they were more than "common criminals". This was a very different approach to that of Margaret Thatcher. She always insisted that Jeremy Corbyn's chums in the Provisional IRA were not "soldiers" or "political activists" but criminals like any other; that their motives made no more difference to the legal analysis of their actions than they did to the reality of the outcome for the victims and their families. One is no less dead for being murdered in a cause and one's killer is no more for it.

Such criminals should be detected, arrested and tried. If convicted they should go to the same prisons as other murderers and be treated exactly the same. Murder carries the maximum penalty presently permitted under English Law because it is the worst crime. Any special treatment of terrorist murderers and their accomplices is legally a distinction without a difference and – worse – will be in their eyes a badge of honour.  

If, statistically, Muslims are currently producing more terrorists, I see nothing illiberal about controlling future immigration from their countries until the terrorism has been defeated. Let's acknowledge we have a problem among the Muslims we already have. Let's own it, address it and while we are doing so prevent it from becoming worse. Some people will call that "racist" but they should not confuse us with people who give a damn about their playground name-calling. Repeal whatever legislation prevents such a policy and put it in force — just as President Trump has been wading through the Deep State swamp to attempt in the USA. Opinion polls suggest there is massive democratic support for such a policy across the whole of Europe.

That leaves the question of the already resident Muslim population most of whom, thank goodness, pose no threat. We can maximise that proportion by some common sense measures:

1. Change our relationship with Saudi Arabia, the heart of Islamic darkness. It does not permit Christian evangelism on its territory. In contrast, as a civilised country, we permit all religions to be practised, but that does not mean we have to allow the Saudis to fund theirs. Currently there are more Wahhabi Korans in the UK than any other versions because Saudi Arabia provides them free of charge. Wahhabism is a particularly dangerous sect and motivates a disproportionate number of terrorists. 
2. If this is thought likely to affect arms sales to that Kingdom, then perhaps we should form an Organisation of Weapons Exporting Countries to fulfil a similar function to that of OPEC in relation to oil.
3. It may be necessary, after appropriate research, to prevent other countries from funding mosques and madrassas in Britain. I see no problem with that either. I am sure local Muslim philanthropists will step into the breach.
4. We should ditch the doctrine of multiculturalism and make it a matter of immigration policy that new arrivals are welcome only on the basis that they agree to integrate into our society and live according to our values. There is no ethical problem, in my opinion, in stating definitively that Shariah Law is incompatible with those values. New immigrants should swear an affidavit on entry to confirm that they understand and accept this.
5. We should break the news to our Muslim communities that they and their families have come to live in a Christian culture. Most Brits may not be religious now but still our country is one formed by Christian values. Constitutionally, it is actually a kind of mild Christian theocracy as we have no separation of Church and State. The Church of England is Established and twenty-six of its bishops – the Lords Spiritual – are ex officio members of Parliament. In this quirky theocracy, the Theos is Jehovah, not Allah. Daft, in my personal opinion, as I very much believe in the separation of Church and State on the American or French model, but no less true for that.
6. We should deliver public services only in the official languages of the United Kingdom. When I lived in Poland, Russia and China I could not expect to deal with the authorities in English. They took the perfectly reasonable view that my weakness in their languages was my problem. To the extent I could not cope I found friends, colleagues or paid translators to help me. By dealing with immigrants in their own languages, we have encouraged them NOT to assimilate and have made it unnecessary for them to learn English. It is our fault, not theirs, that so many Muslim mothers live and raise their children dangerously outside our society's mainstream. I am sure most were initially astonished to find that our public sector is prepared to deal with them in their own languages at taxpayers' expense.
7. We should cut all other services (e.g. translators to sit with children in classes, chaperones to accompany ladies to medical appointments) that discourage integration. Of course we should be tolerant of the needs of learners to bring English speakers along to help them out until they are fluent. I am sure there would also be some doctors prepared to allow male members of Muslim ladies' families to accompany them to consultations. I would not make any doctor do so, however. The ladies in question chose to come to a country where such an approach is alien (and rather insulting to our doctors). No-one forced them to come. They could have stayed in their countries of origin and these issues would never have arisen.
8. We should provide English classes for refugees. They didn't choose to come and it's only decent to help them out. Economic migrants, like me in Poland, Russia and China, should pay for their own damned language lessons.
9. Finally we must recruit thousands of members of the police, the Special Branch and MI5 from among our Muslim citizens. We are so often assured that most of them are peace-loving and loyal that I cannot imagine this will be difficult. As a young lawyer in Nottingham I personally administered the Oath of Allegiance to many new Muslim citizens and kept a Koran at hand for the purpose. I am sure many of their families have suitably qualified members now. 

I don't put forward any of these suggestions to punish British Muslims or even to deter future immigration once the problem has been solved. But if we are to reduce terrorism here, rather than just accept it as "part and parcel of life in a big city", I think measures like these are necessary. Do you agree? If so what other measures would you suggest? If not, then how do YOU think we should defeat Islamic terror?