So in a bit of experimenting as I am not that experienced in this game yet. I managed to win the first crusade as England and got the kingdom of jerusalem. Since I was not planning on playing both over such a gigantous lenght. (and both kingdoms were elective for some reason? o.o ) upon my rulers death I am now playing as the my nephew the strong new king of england. and my youngest son got the kingdom of jeruzamlem. However I now have 2 issues:
I landed my youngest son to soon so he had to select his own bride, ofcourse as a proud crusading holy warrior catholic he choose a: lowborn shia girl. First thing is hoping she converts instead of he but in any case, are there any negative modifers towards getting children between different religion characters? If she does not produce an heir thats liked among the jeruzalites soonish my former eldest son wil inherit the kingdom... he is duke of Cornwall and stands to inherit Normandy from his mother. Perhaps my aunt and then he should meet an early grave... in that case they wont elect his infant son most likely.
secondly. I wanted to create a merchant republic but used an existing mayor. now chelsea is a vassal to the kingdom of jerusalem. Any idea on how to get that back?