This going off topic and starting to become offensive.
The people of a country are not collectively guilty of the actions of a government. The average German had about as much control as we do over the actions of our government (less actually, as early as 1933, any demonstrations, protests, opposition would get you thrown in a concentration camp- and they were horrible places from the very beginning). The average German had no way of knowing the future, there was no way to know or grasp the scale of the crimes that their government would eventually commit, or whether the nazis were going to be around forever. What would happen to your wife and children if you got tossed in a concentration camp, whether you survived the experience, the stigma would taint your children as long as the nazis remained in power and you have no way of knowing they would eventually be defeated 12 years later.
A Father’s first responsibility is to protect his wife and children, your extended family if possible, if you can escape an oppressive government, which the nazi government surely was, you do so. Many wealthy or connected Germans, Jews and opponents especially, did just that. If you were stuck in Germany, what would you do? You muddled through as best you could and if you had enough character you tried to do what you could to help others until the regime was overthrown. Many Germans did just this- Louis Lochner, an American reporter of German heritage wrote extensively on this. Thousands of Germans stood up and paid the price for it, in most cases so did their families.
It is even more offensive to suggest that the children or grandchildren are guilty of the actions of Germans 67+ years ago. That is something "progressives" toss around every chance they get about slavery, - which as Fredrick Douglas correctly attributed to was only possible due to government support (he also indicted organized religion of the period). It isn’t the “people” of a country; it is the “people” that occupy position in government, that use force of law to harm others for their own personal gain (power, wealth or status).
As for a rifle discussion, - It wouldn't be a long conversation if we spoke of Buchenwald as a center for arms production.. they didn't make many rifles and none were Kar98k. Gustloff Werke Weimar had a huge factory in Weimar, the Kar98k were assembled there from components made throughout Saxony & Thüringen. Buchenwald provided some labor but “Gustloff Werk II” at Buchenwald wasn’t a huge success... especially after the USAAC gave it a facelift in 1944.