(Suicidal) AI behaviour

[I of the Storm]

Good morning,

yesterday I got around to start a french campaign on the XL mod. Haven't been playing for a long time so I went normal. I quickly subdued the rebel provinces and kicked the English off the continent. I built deterrent armies in all of my border provinces and aimed for quick crusades that I was able to kick off soon after. I went to Tripoli, Palestine, Antioch - all went well.
In the meantime, Spain got overrun by the Almohads in a way that Leon-Castille were trapped in Navarre and Aragon never got out of Aragon in the first place. Both had depleted Almohad armies to the south and full stack frenchies to the north. Both attacked me .
In the levant, Armenia was at war with the Seljuks and - well, not losing but definitely not winning either. Yet they found it wise to attack my just arrived crusading army in Antioch, equivalent of maybe 2-3 fullstacks

As a sidenote, I have to say the french are insanely rich in the xl-mod. even with only basic farming I could build and recruit in every province and still make profit.

All in all, a very odd experience. I'm still pondering if it classifies as fun.

Btw, I noticed everyone is building ships like mad and attacking ships as well like mad. Is there any file where this AI behaviour is encoded?

Edit: to make the point of this thread clear: I never noticed a suicidal AI behaviour to such an extent with vanilla MTW-VI. Is it just my game or can anyone confirm this observation.