…Multiculturalism failed in Poland-Lithuania, just as it did later on in Austria-Hungary and indeed has throughout history. The Polish case is especially interesting as it is often held up today as an example of a great multicultural state where the various disparate groups lived in peace and harmony. Reality, on the other hand, is much different, especially when it comes to the Ukrainian portions. (Source)
The Failure of Multiculturalism in Polish Ukraine
American Buddhist Net 