>>545785
>Can somebody explain why the Balkans were completely ethnically replaced.
They weren't completely replaced, but mostly, yes. Due to the slavic migration in the mid-6th to mid-7th century that started by the Avars killing the Gepids, and helped by the islamic conquests.
>Most of them preferred to die than to convert to Islam and did rightfully so.
You mean because of the Ottomans? They weren't ethnically cleansed very much except for Albania. But they did have their history robbed.
>What could be the reason then if all this led to these countries becoming completely degenerate Godless countries that can only be taken as a joke
Probably because of the above facts, they were mostly asiatics, plus communism. They are still highly collectivized cultures even today.