He has a point, but not in the way you think. 8 minutes is fine. But what if it had been in Harrogate. Or Exmouth. Or Prestatyn? It wouldn't be 8 minutes, would it. And even if it's 30 seconds, it's still a response - not a prevention.
I heard a very logical piece of analysis on the radio today. Can't remember who it was, but he was talking about arming the police, and the IRA was mentioned. He said that the biggest difference between these attcks & the IRA ones were that the IRA's were of the 'Wam, Bam, Thank You Ma'am variety - i.e. they go in, hit the target, then get out. Arms don't hel pin that situation, as they're gone by the time the police arrive. What he drew attention to is that in every one of these ISIS attack, they remain on the scene to cause maximum carnage. In this case, the first cop on the scene, if he was armed, could end it swiftly. It was a strong argument for arming the police against the current threat.
Apologies for the digression, but it just came back to me there & is an interesting point.
Back to my initial response - are we happy with 8 minute responses? Most of the damage has been done by then - and as I said, can the 8 min timing be guaranteed anywhere but big cities? I think he's right to focus on the root cause. Not a political view, but professional one. ######root cause forms the backbone of the industry I was in before I retired.