I have to say I'm really struggling to grasp the old generic response attitude to this.
London is strong. We will never give in to terrorism. Our way of life won't change.
... and all the rest of it.
Until it happens again, then rinse and repeat.
That's zero comfort to me, we're now starting to face a situation where we have to fight fire with fire. Even if that means the profiling of people in potential problem areas/religions/groups. Could that make it worse? Possibly, but it's already getting worse.
"Love" will not defeat this threat, it won't do anything really. I'm not even sure of the best way to proceed, but holding hands and hoping for the best is a hopeless attitude. Admittedly it's an incredibly difficult situation - one I don't think we'll ever get a handle on.