I wouldn't days its denigrating, just regional differences.
For lack of a better all-encompassing term.
Most of it is dismissive, instead of “oh, that’s interesting”. As many other groups would get for their customs. Just the “never heard of it” you’d not see in most other cultural threads (if you can’t say something nice, don’t post?). Why the need to post how they don’t know it? Doesn’t happen in others. Or the “I’ll take this instead”.
I’m serious, I’ve noticed this total ignorance and disrespect for German culture. Yet is the most influential in American culture (most of that Christmas obsession is German, not English), not to mention genetics.
Anyway, off my soapbox.