As far as I can tell from news reports of Trump's family tree, they were nowhere near Germany when the Nazis arose.
(If you can source something credible that reports differently, please adduce it. Otherwise, your statement's implication is that anyone from Germany prior to the defeat of the Third Reich has a Nazi heritage, and that's clearly quite an overstatement.)
Retropolis
The story of Donald Trumps grandfather, who came to the U.S. as an unaccompanied minor
By Kristine Phillips
July 12, 2018 at 11:01 a.m. EDT
The packed steamship S.S. Eider arrived in New York Citys Castle Garden, the countrys first immigration center, on Oct. 17, 1885. Hundreds of would-be Americans from Germany had traveled for 10 days across the North Atlantic to their new home. Among them was a skinny, light-haired 16-year-old boy who had left his hometown, a small winemaking village where working hard meant just getting by.
Friedrich Trump stood on the deck, waiting for his first glimpse of the New York Harbor, author Gwenda Blair wrote in her 2001 book, The Trumps: Three Generations That Built an Empire.
He did not have much; the young barbers apprentice had brought only some clothes crammed in a small suitcase.
He didnt know English. He couldnt possibly have known English, Blair told The Washington Post. He didnt have anything like a high school diploma. He was literate, but in German.
...
https://www.washingtonpost.com/news/retropolis/wp/2018/06/27/the-story-of-donald-trumps-grandfather-who-came-to-the-u-s-as-an-unaccompanied-minor/