We don't know the motive yet, but a political assassination does not have to be targeted at a politician. If we go by the theory that this was about insurance company practices ("Deny, Defend, Depose"), it is without question political. At the very least, the reaction to it has unfortunately been political, and possibly exactly what the assassin wanted to happen. It's similar to Patty Hearst in that way.
Also, what is the precedent for this? I don't know any off of the top of my head in the U.S. at least.