As for JPII having been opposed to the war, that means absolutely nothing whatsoever with the issue. JPII was the leader of a single religious denomination with an opinion; nothing more. He was not an elected leader of this nation, he wasn't even a citizen of this nation and he never once spoke for this nation.
Aligning yourself with Buckley and Will is probably a lot closer; Buckley is senile and Will has always been a weak kneed little twit.
John Paul II was vocal and persistent in opposing the Iraq invasion. If you don't know that, do some googling - John Paul II and Iraq. He got a lot of grief from neocons. They even sent over a delgation of Catholic neocons to try to persuade him to back a US invasion of Iraq. JP II wouldn't budge. Turns out he was right.