Make an alliance with the Pope, offer money if you have to. If you keep him happy in your alliance you shouldn't have too many problems. Then again I should practice what I preach I took some revenge on France for exterminating one of my cities and conquered 4 of their cities/castles and got excommunicated woooo. Heres a first I control Jerusalem as England and now everyone is Crusading to get it from me more Longbow fodder.