Only in the strictest legal sense. It still involves intentionally killing human beings.
Is pulling the lever in a Trolley Problem murder? Is the navy sniper who killed the pirate captain who was holding hostages at gun point a murderer? Seams like you're taking a moral absoluist stance in a very morally grey world, and remember "only sith deal in absolutes."
Star Wars is not a very good basis for a moral argument.
Nor is naiveté. There are bad people in the world. That's a brute fact you have to account for in your moral reckoning. If you take the purist "no violence" stance, you're abandoning victims to their fate so you can remain pure. That doesn't seem moral to me.