It's not some grand conspiracy, just some guy with a gun.
I can imagine pulling off JFK 2.0... but I don't want to.
Surveillance cements consequences.
If it was Israel, then who cares? Are we doing diplomacy by assassination now? The reality of politically motivated, err, unpleasantness, has existed forever.
Let's not forget the 20yr war that happened straight after 9/11. Less killing the better, and a death in cabinet doesn't always get the change 'the powerful group' may want.
I'd be more worried about getting on a submarine with a console controller now.