Let me be the first to disagree, kind of. All the Holy Father is doing his fufuilling his role as the Vicar of Christ on earth. Do you think that Jesus Christ would advocate war, under any circumstances? Of course not. But then again, He would have better alternatives than any of us to stop war, if He wanted to. Catholic doctrine does not oppose war as a form of self-defense, as is our situation, but you're never going to see any pope advocate a war.
I will quibble with you about JP II being naive. Remember, this man survived Nazi invasion, where many fellow seminarians were sent off to the death camps, as well as the subsequent communist invasion. Without him (as well as Thatcher and Reagan), Soviet communism would not have fell when it did.
There's no mention of a "vicar" in the Bible. It's a RC fabrication.