You can't be racist against German people if you're white, Anglo-Saxon, because it's the same race at that (minus the Anglo), which inhabits much of Germany.
But the 1970s comedy tree was certainly on the edge about it's treatment of people with black or brown skin. When you see that kind of stuff today, it does often make you cringe.
Racism comes in many forms Nebs regardless of skin colour. Not wishing to bring up equallity, black rappers can use lyrics such as the cringeworthy N word yet is deemed acceptable, yet a white man uses such words and is labelled a racist. There is a very fine line in such a fragile subject and dragging this on in a thread that is way off topic would be totally wrong.