in and out they where treated like dirt because they where "Jewish" and then during the holocaust they were executed at a concentration camp. so in reality 300000 lives give or take a few, where killed just on a belief.
When the Nazis came to power in Germany in 1933 jews where live in every country in Europe. A total of roughly 9 million Jews lived in the country that would be occupied by Germany during the World War II. Hope I helped :-)
