Germany and its allies razed European cities to the ground. Murdered millions of their citizens. Carried out horrendous abuses, total warfare.
After years of fighting, the Nazi regime was defeated and decades later, a bloc was formed where countries freely traded with each other, co-operated on issues, formed a defence pact with other countries, and freely travelled between countries.
No matter what you think of the EU, the fact that this was possible, after a devastating conflict is amazing. I don't know how much the older people of Europe, who remembered the conflict, think of the people in the countries who were enemies in total war, but I have always thought it is so amazing to see the people from countries who were bitter enemies engaged in a fight to death only a few decades before, now actively working together.
I don't know what this means for the current situation. It took total surrender in Germany for things to change, It just gives me hope for a future.