That’s your problem. Mind, it’s not just assassination, it’s high profile political assassination done at great personal risk. It’s dripping with symbolism. You have martyrdom, making the enemy appear vulnerable, ritualistic delivery of justice, creating an example to emulate etc etc etc.
Violence is only bad when the bad guys wield it. The good guys have a duty to exert righteous violence, otherwise they would not be the good guys in the first place. A cartoonish example of this is US foreign policy, but yes, that’s exactly how it works, whether you realize it or not.