It's a complex world Kermit. I'd be very happy to tell those Saudis where to go and I feel that an end game is not too far away but we are not qualified to judge foreign policy without all the facts.

You didn't say that. But some of your comments could be interpreted as implying it. If not (and I certainly believe you), then all you're doing is explaining their motivation. Which does very little to help solve the problem. Other commentators have at least proposed solutions, however unrealistic some of them may be, and you have roundly criticized them for doing so. But at the same time, you've proposed no solutions of your own. And immediately ceasing all middle eastern entanglements doesn't count, because that obviously won't solve our immediate problem.

So, what would YOU do right now to prevent the next attack?

It's always SO much easier in opposition. You can say whatever you like. It's when you have to DO something the idealists tend to struggle.

Living down here does have some advantages. At least you can see them cry.

Internment on what basis?
We can't intern people on the basis of religion but we can detain and or deport people who spread propaganda or are suspected of being involved in terrorism. We can also close any mosques that are being used for the spread of the aforementioned.
A far more selective approach about who we allow into Britain would be good.

After the election I'm sure there will be room for a public examination of our policy toward the Saudis. As I have said before, victims of terrorism in Europe and the US are just collateral in the bigger picture. On that we agree.
What I can't say and would always be loathed to even consider is whether that is a price worth paying in the bigger picture.
On face value, I want to do anything that protects UK citizens but in the light of our dealings abroad I would not have allowed hundreds of thousands of potential enemies to come and live here in the first place.

Fascist in Arsenal shirt was Khuram Butt [appropriate surname]. He appeared in a TV documentary last year about British jihadis – and was also involved in a filmed altercation with police after he unfurled an ISIS flag in Regent's Park. In Channel 4's The Jihadis Next Door he was caught on camera alongside two notorious preachers who were well known to police and intelligence officials because of their extremist views.

We have now sunk to a depth at which the restatement of the obvious is the first duty of intelligent men. [Orwell]