UKR elected their government.
Russia didn’t like that.
Russia invaded UKR
The US helps UKR defend against Russian invasion and aggression.
Russia is clearly the aggressor, the invader, the attacker. Arming a nation defending itself against a belligerent is defensive. Arming an attacker is offensive.
One leads to peace, the other war. If you can’t tell the difference then you are not credible or respectable.
Why are you here posting? You should be in Ukraine with your brave, freedom-fighting comrades in the Azov Brigades?