Other ways that might still work (though be sufficiently annoying as to not be worth trying)
- vassalize to someone of the other religion. Hope he sends in his bishop at some point.
- do things to severely upset your heir. Swap to an opposing-religion ruler, and butter him up enough to invite him to your court, then demand conversion and swap back. Do silly things to get yourself killed (large numbers of assassination attempts on high-intrigue people, for example) so that he grabs the spot.
- Build up a significant block of money, then begin a reign of tyranny. strip the titles off of all your vassals, then proceed to imprison/banish or imprison/kill every muslim (and pagan) in your court. Anyone who remains will likely hate you, but that's okay. If necessary, imprison/banish them too. If they manage to flee, that's fine Now there shouldn't be anyone to auto-assign the kids to after you place them with a mentor of your religion of choice. Might be an entertaining thing to try regardless.
- Stop leaving your heirs lying around. Imprison them or employ them. Family members in your council and family members in jail cost no decadence, and can still inherit just fine. Sure, imprisoning your sons on their 16th birthdays upsets your wives and costs some tyranny, but it totally works.
- vassalize to someone of the other religion. Hope he sends in his bishop at some point.
- do things to severely upset your heir. Swap to an opposing-religion ruler, and butter him up enough to invite him to your court, then demand conversion and swap back. Do silly things to get yourself killed (large numbers of assassination attempts on high-intrigue people, for example) so that he grabs the spot.
- Build up a significant block of money, then begin a reign of tyranny. strip the titles off of all your vassals, then proceed to imprison/banish or imprison/kill every muslim (and pagan) in your court. Anyone who remains will likely hate you, but that's okay. If necessary, imprison/banish them too. If they manage to flee, that's fine Now there shouldn't be anyone to auto-assign the kids to after you place them with a mentor of your religion of choice. Might be an entertaining thing to try regardless.
- Stop leaving your heirs lying around. Imprison them or employ them. Family members in your council and family members in jail cost no decadence, and can still inherit just fine. Sure, imprisoning your sons on their 16th birthdays upsets your wives and costs some tyranny, but it totally works.