How and when did Judaism come to Germany? Did it come as wave(s) people? Were there any/many converts? Did they come from Palestine or Spain/the Mediterranean from their jewish population?
They are a substantial part of the german population and I wondered how they got there.
Maybe you can tell my the same about the rest of the Diaspora as well?
You might be interested in a previous thread entitled "Origins of Eastern Europe's Jews?".
There a flaired user gives a comment on the subject matter, tracing out their history giving some mention of Jews in Germany. Their response, though, is of course focused on the Jewish population in the whole of the region so you may find this background worth the read.