I think the only question that needs to be asked is "If the security services were aware of this group, could this attack have been stopped?" To which I strongly suspect that the answer is no, for perfectly good reasons.
I don't know the figures for sure but I strongly suspect that you're more likely to be murdered by a White Man in the UK than any other demographic, and I would guess that it's disproportionately more likely. If anyone can be bothered to look up those numbers it'd be interesting to see them but I don't really think that this thread is going to benefit from seeing them.
