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19 5, 10:27pm
I made this account solely for replying to that post. Your reasoning is completely historically incorrect. I don't know what you are basing this of, except perhaps logic that feels good to you.
One of the main reasons why WW1 was possible (and happened) was because of the isolationist politics the European countries used. If we look at the cold war, most of the issues between USA and Soviet were boiled down to lack of trust and understanding of each other. This means that "unifying" your country by alienating the people that don't fit into the norm is bad. In fact, it has almost always resulted in war. Using Balkan as an example for saying that "diversity is bad" is a disgusting abuse of history and shows a lack of understanding on Balkan history, Serbia's POV versus, say, Croatia's POV.
If we look at real historical events, we can conclude that diversity causes peace. One of the old Arabian empires were diverse in such a way that people could have other religion and still live there without issues (the only thing was that non-muslims had to pay a tax). This resulted in a rich empire. We also have the peaceful trade that occured for, iirc, 400 years, in the Indian Ocean with Muslims, Indians, Africans (non-muslim ones) and Chinese until the Europeans fucked it up with guns and monopol.
Then we have the fact that the 21st century is the most peaceful and safe time for humanity. No, that doesn't mean that there are no bad stuff. It means that it is way more peaceful and safe than any other century (I'd like you to point at a time where it was better for humanity if you disagree).
Like I said in the start of my post, you base your logic on some... I don't know what, assumption? It is historically incorrect though. And logically incorrect too. I suggest that you start reading methodical history books. I recommend The Use and Abuse of History by Margaret Macmillan.