I find it interesting that in the same country a kid with a gun killed more people than this attack managed to; yet in similar bombings in other countries, I think most recent one was Pakistan with 60+ dead, they manage to take out whole marketplaces.
And the publicly spoken of suspects are:
a. al qaeda
b. independent in-country jihadists
c. right-wing extremists
If it's (a) then that's a really poor comeback and it's a far cry from the damage the homegrown terrorist attacks (or call them what you want) on schools have done in recent years, let alone their own crowning achievement of the WTC. However, govt sponsored terrorist drone strikes in other countries will somehow set the score right for the majority of the easily-swayed public, even if they'll result in a far greater number of 8 year olds being shredded - at least they're anonymous. On the plus side it'll provide work for munitions factories and security contractors.
If it's (b) then someone actually took
Four Lions as instructions. Ideally, the sane, intelligent people will prevent the idiots from going pogromist; although most possibly they'll just sit back, watch and tweet in indignation.
If it's (c) then they're just following the road the rest of their ideology's sympathizers around the world are marching down; and sadly enough they're on the rise.
Another point of interest is the lack of someone taking responsibility: for both (a) and (b) this is odd, if it was either one would expect them to take credit with pride right away; on the other hand it's to be expected for (c) as they have the most to lose and so far they've gotten away with it.
Come to think of it security contractors benefit either way as they're bound to from any terror inducing act.