The eagle as a symbol predates the nazis - a lot. The „Reichsadler“ has been used since 800 A.D. as in the region that is now Germany:
The Reichsadler, i. e. the German Imperial Eagle, originated from a proto-heraldic emblem that was believed to have been used by Charlemagne, the first Frankish ruler whom the Pope crowned as Holy Roman Emperor in AD 800, and derived ultimately from the Aquila, i. e. eagle standard, of the ancient Roman army.
Edit: of course the Nazis twisted this as well. To decide, if the eagle has to go, we need more details:
During Nazi rule, a stylised eagle combined with the Nazi swastika was made the national emblem (Hoheitszeichen) by order of Adolf Hitler in 1935.
Despite its medieval origin, the term “Reichsadler” in common English understanding is mostly associated with this specific Nazi-era version. The Nazi Party had used a very similar symbol for itself, called the Parteiadler (“Party’s eagle”). These two insignia can be distinguished as the Reichsadler looks to its right shoulder whereas the Parteiadler looks to its left shoulder.