"No war but class war" doesn't mean you cannot fight or support a defensive war.
If it does, it is an irredeemably stupid position.
The non-revisionist, non-reformist, internationalist socialist position can eat dicks.
If there is an imperialist aggressor invading another country, then the MORAL position is to side against the aggressor. Because regardless of how you feel about the governments (which, fuck all governments, so what's the point in making that distinction?), the civilians will be feeling the brunt of the war.
There is an imperialist aggressor and it is Russia.
Sorry, I can't hear you over your staunch adherence to revisionism in favor of authoritarian imperialist powers masquerading as socialist or communist.