Sometimes one wonders how long it will take for liberals to actually perceive differences between ingroups and outgroups as far as seeing the later as possibly being some potentially dangerous entity. I do not believe it is actually possible, as the liberal/progressive/materialist/humanist/et cetera is in such a state now that they would have to exit that frame of thinking totally in order to sustain their own lives and the lives of others.
Obviously there is not much I can say on this topic beyond the obvious, though I will just add that this will not be the only attack of its kind this year. I predict similar instances to take place in Birmingham and/or London, and/or somewhere in Germany before New Year 2017.
Thoughts and blessings to all who have suffered today.