Jesus never said to be Neutral. He said his kingdom is no part of the world.
The neutrality comes in when they say American JWs didn't fight against Germany and German JWs didn't fight against the Allies. That's not neutrality. That was their saying: We didn't kill anyone from any sides.
But German and Japanese JWs would have known that their was was bad, but the Allied JWs would have known that their war was good. That is the difference.
Same with today. JWs in Russia wouldn't be fighting Putin's war, so anyone fighting against the Russians wouldn't be killing JWs there. But JWs in Ukraine should be against the war criminal Putin.