A lot of reports and surveys about "level of individualism in country XYZ" use "individualistic" to mean the opposite of "driven by extended family relationships". This is a very misleading way of using the term "individualism". A more accurate term would be "anti-nepotistic". German culture is certainly less nepotistic than the average for the world or even for Western Europe -- but to describe this as individualism is extremely inaccurate.
There is a quote from the book _three men on a bummel_ written in 1900 wherein one of the characters states that he could take over Germany simply by putting up the correct signage as Germans followed all the rules; even their dogs would not walk on the grass signed "do not walk".
Germany when ww1 came around was not old, it was a small militaristic kingdom glueing together half diggested bits of in between empire countries, wedged between eternal giants of France, Britain, Russia, Austria Hungary. To life in in between country is to know what the great game is all about, it's about painting on a map, so that the real, the capital city people can have a nice life, while in between country folks serves as disposables for taxing, torturing and throwing out of cellar windows. evil is gestated and caricature like evil is gestated in caricature like circumstances. The modern left is unable to perform this kind of analysis any more, but the nazis were a afterbirth of imperialism and nobody can prevent this from returning without understanding of the conditions that gave birth to this.