I care not a whit whether the shooter was an addict or mentally ill, Another Commenter for Hire.

That he ambushed a peace officer is all I need to know, or understand.

And, what if he was somehow influenced by the rhetoric of the radical left, stating over and again that the police are the enemy?

I peruse the sites of the leftist ideology, just to see what they are saying, and the war against cops is very prevalent, across the board.

And you may be indeed correct within your own assumption that this was a singular incident, but you may very well be wrong as well, as the war upon cops has come unto fruition under the leftist leadership of not only Obama and his underlings within the White house, but under the leaders of the major leftist led cities as well.

It is the far leftist ideology that is violent, whence they do not get what they want, or have been somehow promised, and believe that anarchy is the answer, rather than mediation, or resetting the status quo. 

Have a great day