I also agree with what Mrs May said there. But there is something unsettling about the fact that the same lady who said that, only a few months ago told the House of Commons specifically that she is ready and willing to order a nuclear attack which would kill hundreds of thousands of innocent civilians, which would of course include enormous numbers of children.

Perhaps this horrible atrocity in Manchester might make more of us realise what is involved in doing something like that, though on a vastly greater scale.
........

One striking and puzzling thing in this suicide bombing, which echoes what has happened in previous cases, is that the bomber made it so much easier for the police to have a start in finding possible confederates, by carrying identification. It is possible to imagine that a solitary killer might actually wish to be identified, as a way of making a statement of some kind, but for one acting under the direction of others, which it seems pretty evident is the case here, it is self-defeating.