Anyone I have met over the past forty or so years tend to tell Newfie jokes...jokes about people from the province of Newfoundland...and 99% of the Newfie jokes were told to me by people from Newfoundland to begin with.
I haven't heard the derogatory term "pollack" for about 30 years! Unfortunately, I believe it was my grandfather who used the term...a bit unusual considering his mother was Martha Czapiewski and her family came from Kalisz.
And also, most of my friends are HUGE Pope John Paul II fans, have read his books etc. and thus would never insult the Polish, even in jest.
I lived in Manitoba for about eight years and there is a huge Ukrainian population out there. I never heard any jokes about these people.
Maybe I just live a sheltered life!