What if the Ottoman dynasty comes to an end due to fratricide?
Let's say Murad IV kills Ibrahim. What's next?
I am given to understand that there was a pact where the
Giray dynasty of the Crimea would be enthroned in such an eventuality. No idea on how many of the local magnates/vassals would go their own way (or try to) while the governmental structures in Constantinople locked the bumpkins in question out of power.
Tax: Imagine a few personalities (not least that of one Isabel de Trastamara y de Aviz) involved in the unification of (most of) the Iberian peninsula being rather different... perhaps less dogmatic....
Spain's State Religion is Catholicism. Full stop. While Muslims and Jews have extensive access to a number of skilled professions, scholarship, and even middling Civil Servant ranks; thy have to cough up extra taxes and their houses of worship (especially new ones) outside the most backwater villages of the far south (and possibly some explicitly mentioned in capitulation treaties) get the full
schuilkerk treatment while failure to convert eliminates any possibility of a military career or a non-advisory political one above village headman or member of a city council.
That is the official line.
In practice, if certain members of the nobility up to an including the
Duques de Nasr do not set foot in the shiny new churches/cathedrals save for the most unavoidably obligatory state ceremonies, keep their private chapels very much so, and perhaps have some resemblance to the prosperous families visiting certain "Casas de Ismael" (or whatever polite euphemism comes into use) on various holy days? It is quietly-but-firmly understood that no fuss is to be made.