What , why and for how long

I am a man in crisis, why you ask, because I am trying to be objective and sensible and yet it is impossible when all this craziness is happening! Of course my crisis, pales into insignificance, in relation to the tragedy that has befallen innocent people because of a few fanatics who have indiscriminately attacked them. 
I have written many times, expressing my despair at the inhumanity of these crimes, I fail to understand the motivation of an ideology, that promotes such barbaric attacks. I am a peaceful man at heart and I desperately try to respond in a sensible manner. I do not wish to escalate the violence by saying we should respond in kind. I know there are many who espouse the view to kill these terrorist on sight and it is difficult to argue with that view, given the devastation that they cause. It must be impossible for the security services to stop, all of these acts before they happen, given the random nature of the attacks. 
So I just don't know how to respond any longer, the same tired old words and phrases that condemn, seem inadequate and trite! No sensible, caring, person can do anything but express their sadness and despondency.
I have no solution, I'm not clever enough or sufficiently informed to provide one but this I am sure of, if history has taught us anything, these acts will pass, the world will find it's equilibrium and this heinous cruelty, will eventually be defeated. Those who hate and act upon that hatred cannot prosper and can be stopped.
I am not a man who follows any faith, I do not believe in any God but I am convinced that all right minded civilised people will overcome.