The Irish & Italians are both thick headed. They are a temperamental, fiery people. The blacks, too, are actually similar to the Irish & Italians in this regard. It's probably because of communal, shared experiences back in the day.
The English, Germans & Dutch are more reserved.
The Eastern Europeans (Russians) are probably more secular.
Just my observations.
I invoke my right under the 5th amendment of the United States constitution and decline to answer the question.