Some of you people really need to brush up on your game mechanics. As has been said it takes a war declaration to arrest a priest. You can't deport a priest (or anyone) without first banning them. You can't banish a foreign priest unless he was tossed in prison by the game itself while commiting a crime like inciting the peasants or performing an auto de fe. I.e. you cannot have a noble arrest a foreign priest and then have your judge ban them. You cannot cancel a war without agreement from both sides. A cease-fire constitutes improving relations which requires mutual consent. If you declare war you have to get the other side to agree to end it.
