Attacking a country that's invading your own is an act of defense. Ukraine could blow up the Kremlin with a cruise missile today and it would be a defensive act, because every act of war that you take after being invaded is a defense against your enemy's ability to continue invading you. That's exactly how it has always worked, and that's how it will continue to work forever.

How about stop the killing completely?

I couldn't agree more, Russia should tender their unconditional surrender immediately. But that's not what you mean, you mean Ukraine should negotiate for an armistice and kiss their stolen territory goodbye. Capitulation to the violent to stop more deaths is a nice idea that makes you feel all warm and fuzzy inside, but out here in the real world it doesn't work. At all. If it did, giving Czechoslovakia to Germany would have averted the second world war. Killing isn't murder when you do it for a just reason and have exhausted all your alternatives. Suing for peace and selling your territory and people to an enemy in exchange for "peace" isn't an alternative.

Also, stop being a creep.

Pointing out why an imbecile should be ignored: creepy
Advocating for appeasement to a dictator: NOT creepy

This thread has nothing to do with your comment.

Deal with it, complaining about me invading your space is an OFFENSIVE action after all, you should just lay down and take it for the sake of peace.