Some Muslim communities in the UK are partly to blame for young people joining Isis, David Cameron will argue today.
The prime minister's intervention comes at the start of Ramadan and after the death of a 17-year-old suicide bomber from Dewsbury and the disappearance of three sisters from Bradford who are understood to have travelled to Syria with their children.
At a security conference in Slovakia, Cameron is expected to accused some Muslim communities of "quietly condoning" the extremist ideology of Isis - including that women are inferior and homosexuality is a sin - rather than confronting it.
He will say:
We've always had angry young men and women buying into supposedly revolutionary causes. This one is evil, it is contradictory, it is futile – but it is particularly potent today. I think part of the reason it's so potent is that it has been given this credence.
So if you're a troubled boy who is angry at the world or a girl looking for an identity, for something to believe in, and there's something that is quietly condoned online or perhaps even in parts of your local community, then it's less of a leap to go from a British teenager to an Isil [an alternative name for Isis] fighter or an Isil wife than for someone who hasn't been exposed to these things.
Cameron is expected to say that as well as families and communities, the government and the police have more to do to prevent radicalisation.
This, from today's Daily Mail and Mail Online, probably doesn't help either.
More: [This is where Isis supporters tweet from]1