Late Stage Capitalism

This is random, but my great grandad is a German who settled in Peru after WW2. 90% sure he was nazi based on historical context and genealogy. Most likely, he was a civil engineer, which is terrifying. I wonder if he's turning in his grave, knowing his great grandson is a communist. There's a ton of records of his life from his account, but none of them match up with external sources. He claimed to have been American and fought at the battle of the bulge and d-day, but he basically "teleports" to South America after WW2.

Edit: Another sign was that my Grandad (his son) would talk about 2nd generation Japanese/ Germans a lot. In South America, new immigrants from Germany/ Japan would go to talk to the people who looked like them, and they couldn't speak German or Japanese. My Grandad was one of those people. He speaks English, Portuguese, and Spanish. He couldn't speak German. They were all getting thrown together on engineering projects, but my Grandad switched to engineering for Boeing. Honestly, I'll throw my last name out there if anyone is interested: Brendel. That's not my actual last name, but that's the accurate version. I don't even want to get into that.