I hate how “anti-war” has been hijacked by these people to mean, let imperialist countries invade whoever they want with no consequences. (in the case of tankies, any imperialist country that isn’t in NATO).
Republicans spent significant efforts trying to prove shady business interests of the Bidens in Ukraine and never managed to find jack shit that ever seemed improper.
The US acts in its own interests. Countering Russian imperialism is part of that. They're not helping Ukraine out of pure good will, sure, but in this case US interests do align with doing the right thing.