Thank you Felix,
Was aware of the historical Polish, and to a much lesser degree, Hungarian respect for Jews, in particular in Budapest.
In fact, lamentably, "The Habsburg laws which prohibited anti-Semitism disappeared with the empire."
Liquidating a people, while on the surface for maniacal religious or idealogical reasons -- there must always be 'the archetypical enemy within and without'--, also had much to do with the theft of money, property, and other forms of wealth.
And of course for their slave/slav labour.
It was somewhat similar in Uganda, when Idi Amin expelled the Ismailis, who were the business, professional and bureaucratic class.
Amin wanted their wealth.