The Biden administration has lifted a ban on arms shipments to the Ukrainian military unit known as the Azov Brigade, a former militia with ties to far-right hate groups. The State Department said Tuesday a thorough review turned up no evidence the brigade’s members have committed human rights abuse...
Okay you now have stated a correct reason. I would add two things that can help you refine your way of seeing things :
It's probably best to say 'kill Russian invaders' or even 'kill invaders', since the problem is invaders and not Russian (I mean, killing random civilians in Moscow wont help Ukraine, but it's still what you said is good)
Insisting on killing is still weird. Killing soldiers is not the goal of fighting an invasion back, it is one way to achieve the real goal : all Russians soldiers out of Ukraine. If that's what you're talking about, i advise you to say 'fighting' instead of 'killing', so it's not mistaken for a random bloodlust against a country.
Now I got to apologize if we agree on all those points, I mistook your shortened thinking for blatant stupidity, which would be my bad