Independent Turkish Balkans as a European US?

Now that I've thrown a bunch of words at you, here's some exposition.

In an article about the Ottoman Empire, they argued that while Asia minor was sort of the central stronghold of the Empire, and the area around the black sea straits was the command centre, and of course there were important cultural and religious reasons to hold on to muslim lands, the European parts of the Empire were their most proportionally productive breadbasket and objectively the most "valuable" part.
These territories were also arguably settler colonies, though the native-to-settler ratio never reached American levels overall.

So this is the scenario: could a more populous turkish settlement colony emerge in this area, eventually declare its independence from the Ottoman Empire and become a major European (and global) power in its own right (with all "native" european populations mostly assimilated or otherwise too marginalized to reclaim the territories for themselves, rather like native Americans in the US today) ?
Would European powers try to step in to destroy this entity out of principle, in a sort of new reconquista (the only other event I can think of where such a large settler majority was eventually defeated) ?
 
There'd need to be a reason for a mass influx of Turkish settlers to a specific part of the Balkans and then a reason for birthrates amongst the native populations to drop. You don't have foreign diseases that the European's have no immunity to sweeping through and wiping out 90%+ of the Balkan population. Any diseases the Turkish bring will be already familiar to Europe.
 
What would that place be, the Ukrainian shores of the Black Sea? That seems to be about the only place where settlement was light on the ground and could attract people. An early abolition of the Crimean Khanate? In which case I bet Russian Empire might help the Crimeans beat down these Turks.

The Balkans are nearly impossible. Seems like it's more the lands which the Greeks, the Slavs, etc. can't possibly seize, and the OTL Bulgarians showed they could seize plenty of Turkish land by the amount of Turks in Bulgaria nowadays. And I'm talking within the Ottoman state, after all. It seems kinda doubtful.
 
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