Falafel stands, female genital mutilation, first-cousin intermarriage and now…”homegrown jihadis.” Diversity — what a concept:

Delivering the Lord Mayor of London’s annual defence and security lecture, he said the current level of threat was the highest he had seen in a career spanning 32-years . In the past 12 months his agency has thwarted six terror plots in the UK and another seven abroad. Mr Parker said four fifths of the 4,000-strong agency’s resources were directed at stopping terrorist attacks, with an increasing proportion of them linked to Syria and Islamic State of Iraq and the Levant (Isil).

Islamic State terrorists are planning mass casualty attacks in Britain the head of MI5 has warned. Andrew Parker, director general of the security agency, said threats from homegrown jihadis who want to fight for the militant movement showed no sign of abating. He also publicly admitted for the first time that MI5 had to carry out computer hacking attacks against terror networks to crack their communications.

For those of you scoring at home, that would be Obama’s “junior varsity.”

He said: “More than 750 extremists from this country have travelled to Syria, and the growth in the threat shows no sign of abating. “We are seeing plots against the UK directed by terrorists in Syria; enabled through contacts with terrorists in Syria; and inspired online by Isil’s sophisticated exploitation of technology.” Britons are being rapidly radicalised online and then encouraged to carry out low tech but deadly attacks. He said: “On top of that, in a range of attacks in Europe and elsewhere, this year we have seen greater ambition for mass casualty attacks.” While the rise of Isil had dominated the headlines in the past 12 months, he said there was still a threat from al-Qaeda terrorists who are also planning massive attacks in the UK. He said: “All of this means that the threat we are facing today is on a scale and at a tempo that I have not seen before in my career.”

First thing to do is stop calling them “Britons.” That word has a very specific meaning, and it does not — and can never — apply to Arabs and Pakistanis. Any more than if a real Briton were to move to Saudi Arabia or Pakistan.

Second thing to do is immediately and publicly deport the extended families of any of them found to be working with ISIS.

Third is to stop allowing them into the country.

Will Britain do any of this? Of course not.