As De-Legro already, you have what you need to start a conflict. Go ahead and declare it openly. What it appears to me is that you want to do whatever you feel like doing, and make the *other* guy declare the war. i.e you don't want to be the one to push the "declare war" link.
Uh... right back at you:
What it appears to me is that you want to do whatever you feel like doing, and make the *other* guy declare the war. i.e you don't want to be the one to push the "declare war" link.
Seriously, it goes both ways. However, by allowing realms to arrest priests it allows for a nice showdown. Sure, we're going to send our priest in to start converting. Arrest him. I dare you. If you do, instant Casus Belli. Does the small realm take the risk of offending the larger by arresting their priest? Does the small realm with good relations and powerful allies try to send their priest into a larger realm. I think allowing it adds a really nice political dynamic to the game.
If they are preaching in your realm, then you go preach in their realm. Or stab the priest. Or go loot their realm. Get their allies to put pressure on them to stop. Cancel your peace treaties. Get your allies to do the same. Force your lords to sack their temples in your lands, or close them down altogether. Persecute their followers. Have your priests foment unrest and uprisings in their lands.
You have options. Use them.
No one is saying there aren't already options. Of course there are. All I was saying is that this would be a really cool option to have
also.