you probably don't have facebook.
In facebook for the last 1-2 years there have been some disputes/wars about cultural differences, what someone stole from someone. Successes of each nation. Hatred has been accumulating. I am only subscribed to groups on facebook about technologies that interest me, but facebook actively pushes all sorts of posts into my feed.
Unfortunately, humans are designed in such a way that they cannot live without periodic wars. Especially as long as countries/nations exist, there is a reason for war. Hatred tends to accumulate in humans and war is a good way to let off "steam of hatred".
Someday (we will not live to see it) countries will be banned and there will be only one nationality - human. Only then will wars stop. And those people of the future will see the history of our days and be surprised at what savages we were. As we are surprised at the savages of the Stone Age or the savagery of the Inquisition of the Middle Ages.