Such a big thing won't go away easy.
200 years ago, the United States and Great Britain were not very friendly
Today they are buddy-buddy
Alsace-Lorraine is another region in which changing times have softened racial (yes racial) hatreds
Look at the Ukraine in WWII. many Ukrainians actually hailed the Germans as
liberators. At first. then it was hoo-boy, look out. And the Soviets took a horrible toll on Germany proper at the end of the war
70 years later, how many Germans howl for the blood of the Russian people?
Big things can go away in 50 years