>>216053744 (OP)
It's because Serbs are cunts. When after WWI Croatia, Slovenia, Bosnia and Vojvodina formed a state, it was called the "State of SLOVENES, Croats and Serbs". Makes sense, because it's populated by those peoples, right? Seems the names are ordered from West to East, no big deal.
Then Kingdom of Serbia and K. Montenegro joined in, and now the state just HAD to be called "Kingdom of SERBS, Croats and Slovenes". They DEMANDED that Serbs come first. You might say it's because they're the most numerous group, but Slovenes weren't most numerous in State of SHS, so who gave a fuck? It's that Serbian pettiness that is extremely annoying and very telling of what they actually think. They're always like that, like some spoiled stupid brat who wants all of the cake and it's not even his birthday.
And, of course, they started fuming whenever Croats would say that we speak "Croato-Serbian", because we had to call it "Serbo-Croatian", God forbid you say it any way else. These Serbs also in the 19th century claimed that Croats are Catholic Serbs, they oppressed Croats after WWI, they massacred Croats during WWII and during second Yugoslavia kept whining about how they're eternally oppressed, how everyone is against them and how history is just a big conspiracy against Serbia.