I guess it would be a period of secularisation and people (I’m using the Slavs as an example) getting more in touch with their origins and using them to promote progressive material.

In BiH in particular I could imagine people adapting Queen Katherine as a unifying symbol (because in reality, all 3 peoples have claim to her). She lost her kids to an army that conquered her country and died without them.

Maybe using her story of victim hood (which Balkaners and Slavs love to do) they could push forward new concepts for the area, like focusing on accepting tragedy and learning how to move past it, agreeing on an aesthetic they’d like to promote for BiH and perhaps establishing cultural liaison programs with other non-controversial Slavic countries, like Czechia and Slovakia (who are already established historical minorities in BiH and whose presence actually benefitted all of BiH as a whole during Austria-Hungary).

But this is just a fever dream. In order to do that people would need to willingly reduce how much their religion defines them. IMHO, they wouldn’t have to downplay it that much but even moving an inch for those people inspires panic and sense of loss of control in them.

As of rn, people don’t really identify with Queen Katherine or her story, nor are people’s Slavic identities really significant to them for the time being (at least not among the Croats and Bosniaks).

But yeah, if this ever happened it could be the spark of the Balkan age of reason. And maybe it would finally help calm everyone down a little bit.