The Serbs were the ones who started WWI. It was their state sponsored terrorism that lit the fuse.
You also neglected to mention the 800,000 Hungarians placed in Czechoslovakia (Slovakia today) without a vote and the 2.3 million Hungarians in Transylvania places under Romanian rule - the largest ethnic minority population in Europe.
It is you who doesnt know what hes talking about.
One is never too old to learn new things.
Back on topic - Austria-Hungary was looking for an excuse to pick a fight with Serbia - and the actions of that moron, Gavrilo Princip, gave them the excuse. Yes the 'Black Hand' had lots of support in Serbia proper - what about the faction in Austria that was looking for a military solution with Serbia? Were they blameless?