So I noticed once upon a time, while defending Jerusalem from a Jihad that I was getting a +75 vassal opinion bonus from defending in a holy war.
This came in handy when my character died and was replaced by his son in the middle of said war. Instead of panicking about huge negative opinion vassals due to short reign or pretender status, I just carried on with the war with all my vassals content. It was a long bloody war and by the time it was finished my short reign negative was gone and I'd arranged for several "accidental" deaths.
Later, while sieging my way through a militarily broken France on a conquest war the Muslims attacked again. While I did have to divert some of my armies, my vassals who were grumpy after such a long war in France, all of sudden were happy again. I could finish off France without threat of mass revolt back home while my split army combined with every other Christian nation who lept to my defence dealt with the jihadis.
QUESTION is, as I quite LIKE it when the infidels attack, giving me a huge vassal opinion boost and thereby room to breath, is there any way to goad foreign powers into attacking you at a politically opportune time? Any way to insult them or perhaps fail assassinating them on purpose?
Best Answer
All Crusades, Jihads and other Holy Wars are all started by the religious leaders declaring one, for Jihads this is the Sunni and Shia Caliphs. There is no direct way of starting a Crusade or 'goading' them into a Jihad - instead your best option is to try and gain control of important religious territories, this will eventually lead to a religious war being triggered.
Crusader Kings 2 works by applying religious weight to different territory, the higher the weight the more important it is for that religion and thus the more likely it is to trigger a religious war. In your case you are looking to trigger a 'Jihad' which means you need to target the most important Muslim territories, listed below in descending order of 'weight' I have listed the most important Muslim territories...
There are more territories than just these but they are the most significant and most likely to trigger a Jihad if under threat or are under the occupation / rule of a Christian or non-Muslim leader.
Additionally if any of the following conditions are met with regard to territory then a Jihad will automatically begin...
Besides taking territory and directly confronting the Muslims all you can really do is wait for a Crusade / Jihad to begin by letting the religious leaders declare it on their own. You can of course 'sow dissent', 'assassinate' and generally cause as much disruption as possible to the Caliphs to make sure there as fired up as possible but this is unlikely to do much other than make people who probably hate you, hate you more...