The problem with this is that it is the kindergarten teacher insisting that we all get along at any cost.The world is not a safe place unless every country is afraid of losing a war, any war.
There's a high price for this: problems do not get addressed because aggression is demonized.
They smoulder, and then explode later.
As we're seeing now.
I don't think it makes any more sense to be anti-war than anti-killing. Sometimes, bad guys need to be killed.