Indeed, the desire for murder, violence and revenge in some here is rather sickening
Fear will do that to people - even good people. It is as dangerous, in its way, as is zealotry.
War is a horrible thing regardless. To win though, one must be willing to fight at least as hard - and as dirty - as those they are fighting. There is no such thing as an honorable war now, if there ever was.
Our problem is that how can we, as a civilized society with a human conscious, stoop to the level of those who threaten us while retaining what makes us civilized and human?
While many of those who threaten us may claim to hold certain beliefs there are vastly more good, decent people of that same religion who are in no way worthy of pain and suffering any more than the poor people the terrorists target. And these are the people that the terrorists hide behind, or perhaps more correctly use as shields.
It may be an unanswerable question. Doing nothing will undoubtedly lead to repeated, and likely more frequent, occurrences like the one this week. Doing something that actually changes anything is almost unthinkable do to the inevitable collateral loss of innocent life.
As for those espousing hatred and anger now, I understand it and would be lying if I didn't say that at times I felt the same. Still if we allow hated to blind us then we surely lose.