My grandpa’s father got shot by a Nazi in front of my grandpa when he was only a child. He didn't die immediately. He died a slow death because he couldn't make it to the hospital in time. My grandpa's father was part of the resistance in The Netherlands during the second world war.
My grandpa still tears up when he thinks about it, but even he said that there were good Germans and bad Germans. The good Germans played with him and gave food and blankets during the Hunger Winter in which thousands of people died of starvation and the cold. The bad Germans shot his father.
Even during the second world war my grandpa knew that not all Germans were bad, and now, 70 years later, he holds nothing against the Germans. The Germans now aren't the ones that shot his father. Their parents aren't either. Even their grandparents were only children themselves when it happened. The bad Germans he knew are all dead. So why would he still he mad?
If he can forgive the Germans, why can't you?