The rise of ethnic nationalism is what prompted the collapse of Ottoman control in the Balkans, and it was the local Communist Dictators who kept it in check. Trying to blame the mess in the Balkans on the Ottomans would be like blaming the United Nations for not stopping WWII.
No. Aaaagain, the Ottoman occupation/colonization of the Balkans is the reason this region's development was ******** for centuries, separated from the European mainstream (-> renaissance, reformation, religious civil wars, enlightenment, nationalistic wars, liberalism). It gradually seeped into the Balkans as the Ottomans weakened due to their utter inability to embrace modernism in time, and so when the Ottoman Empire collapsed, it exploded into a series of war and strife. It eventually triggered WW1, then calmed down a little, exploded again during WW2, then calmed down a lot during the Communist era, and then finally exploded for the (as of yet) last time in the 1990s. Basically, the Balkans needed to catch up with centuries of history which it was denied by the Ottomans. Turkey did nothing to actually solve the existing conflicts there, it just wasn't aware of them, ignored them, used them to its own advantage, and sometimes created new ones. It was a suffocating empire which pretty much screwed up every region it touched, the Balkans most of all.
What we've seen there recently is a legacy of that.
Last I heard, if Belgium were to break up, Flanders wouldn't be bombed by NATO back into the stone age.
If it surrounded Brussels with heavy artillery and started bombing it, killing the Walloons en masse, maybe it would. Even if only because NATO HQ is located there
we keep hearing that in May 1945 , at least one German woman and her children were tied together with barbed wire and thrown into a river in Prague . Are there any rivers in Prague ?
Nah, no rivers
Much worse things happened during the expulsions, thousands, perhaps tens of thousands of Germans were killed, it's hard to say exactly how many. Men, women, children, old people, POWs... The issue was taboo during the Communist era, and in the early 1990s people were shouted down if they tried to open a debate about it (because there was a fear that the newly unified Germany might turn revisionist and demand compensation). Only in the last ~10 years have this been discussed, and increasingly the public is being made aware of all the atrocities that were committed by Czechs (usually those who didn't lift a finger during the war) on Germans. Recently a film footage was found showing Germans being shot and then run over by trucks. Several mass graves have been uncovered.
There is still a long way to go for the average Czech to be able to face this part of our recent history, though. A lot of people are still too blinded by knee-jerk nationalism to admit the post-war expulsions were an act of mass-scale ethnic cleansing.