That's funny, I am German and that comic book was always one of my favourites. I never made the connection that it was supposed to be demeaning or that there was a controversy around it. I always took it as being cheeky like Asterix in Britain.
Erbfeindschaft (https://en.wikipedia.org/wiki/French%E2%80%93German_enmity) is still alive and well in Germany so it's not like there is no awareness of these sentiments anymore. Although under the EU project that has improved a lot in the recent two decades because both the French and Germans found a common enemy in the Brits ha.