AHC (American Heroes Channel) runs a lot of great WWII history shows with interviews with old soldiers.
One Brit said “We were good men who committed unspeakable acts of brutality because the Nazis would have it no other way”.
Dad didn’t say much about that. He told of being in a foxhole and a very American voice begging “Joe? Joe! Where are you?” He said he didn’t answer and it was very dark. When a man crawled into his foxhole he killed him with his knife and waited until morning to see who he’d killed. It was a German.