I'm surprised these replies in an anarchist comm haven't brought up concepts like Propaganda of the Deed already. (that said, I know for a fact some people responding aren't anarchists)
While I consider PotD of the 1890s-1900s to have failed in its intentions and is worth strongly critiquing, and while the crappy neo-Nazi imitation advocated by their popular text Siege has also been extremely ineffective, this assassination has provided an interesting case study - the killing of a healthcare CEO with no innocent bystanders is one of the least controversial extreme deeds yet. I've seen people even claiming this could become the new Columbine (we'll have to wait to see if that prediction is worth anything, but it would be nice to see the ruling class be shot up for a change).