In Germany every region (including one’s own) is a stereotype - putting down each other’s tribe is even a favourite topic for reciprocal jocular insults among work colleagues because it’s safe i.e. understood as not meant personally.
To my Swabian colleagues I (a Hamburger by birth) am still a fishhead while to Hamburgers Swabians are industrious but tightfisted.
Generally the people from other non-city states are funny-talking hicks (the indigenous Berliners are funny-talking urban hicks to other Germans).
West Germans are greedy, overbearing and the reason for a sizable minority of East Germans to wish the wall back
East Germans are lazy, don’t appreciate democracy and the reason for a sizable minority of West Germans to wish the wall back
Bavarian and Saxon dialects are humoristic clichés.
Sauerlanders are considered dour by other Germans.
Siegerlanders are considered dour by Sauerlanders.
Rhinelanders are pathologically convival.
East Frisians are the butt of ‘stupid’ jokes since the early 1970s
The village of Ganslosen was the butt of ‘stupid’ jokes until they got sick of it in 1849 and renamed themselves to Auendorf.
An example of battling stereotypes, by Otto Waalkes:
An East Frisan and a Bavarian team had a football match.
After a few minutes, a passing train whistled.
The East Frisians thought the match was ended, and went home.
Thirty minutes later, the Bavarians scored their first goal.