in 2019 im not so sure...
I've never had a problem. It's not like the early 20th century when German immigrants had to completely deny their heritage, drop their accents, and forget how to speak the German language in order to blend in with "white anglo saxon Protestant" America because Germany was invading their neighbors and murdering Jewish people.
They key is to not throw out the "white heritage" thing, because that's directly associated with "white supremacy" and burning crosses and lynchings and nothing you want to have anything to do with. Getting specific with exactly where your family came from can be a lot of fun though.
Say "German heritage" and if anybody asks "what's that?" then you get to have fun talk about beer steins, bratwurst, Octoberfest, and lederhosen.
I am half German ironically, with a true German last name :iono: :laugh:
I'm probably as close to 100% German in ancestry as it gets for someone born in America. All of my grandparents had painfully German names.