As someone who grew up entirely in the US, had hardly zero contact with my German family members, and who fluently speaks, reads and writes German, I have to say your description of German people (on social media) agrees with a similar thing that I think every time I go read what is happening on "German" social media, namely, that some Germans have a very peculiar way of being smug and wrong, such that it is literally indescribable.

That's why when people I know in the US tell me that they'd like to live in Germany because of how much more "radical" German politics are, it so directly contrasts with my own experience that my brain disassociates for the next 20 minutes to protect my Ego from having heard something so absurd.