Elon musk is not a military entity. He is a private citizen. His taxes just like yours and mine are going into this war. But he is also providing starlink to the civilian population as a humanitarian gesture. Expecting every private citizen to get up and wield a weapon against Russia for Ukraine is not realistic, nor does refusal to do so make you complicit in helping Russia. Just like being a conscientious objector in Vietnam didn't make you complicit in supporting the Viet Kong.