Three and possibly four officers have lost their lives at the hands of another ex-military member who had "lost it". I have just read every single comment in this string and hardly any of them express the kind of extreme sadness and horror that I feel about all of this so perhaps my comment does not belong. 
Horror at the loss of more officers lives and horror that another man who served our nation reached this level of desperation.  If, instead of trying to find someone else to blame for this insanity we were to spend our energy looking at what we can each do to help put an end to it we would all be better off. 
Blaming our President is ridiculous and serves no useful purpose. Instead try to come up with useful solutions that will bring us closer instead if dividing us further. If all else fails invoke the Thumper rule and refrain from adding fuel to the fire. "If you can't say anything nice, don't say anything at all!"