Their history is very well documented. The Ashkenazi came from Italy into Germany, then moved into Poland (a bit different geographically from modern day Poland) after crusader pogroms in the 11th century.

Jews were in Czech Republic since at least 9th century. I don’t think they were German Jews.

As I said, geography was a bit different back then. These are the same people I’m talking about. They came from Italy.

I don’t think they did but I won’t convince you.