Why do you think the authorities forced the Jews to live in the kitchen?

In the time of the Nazi regime in Germany, as described in the novel "Milkweed," conditions for Jews were horrendous. The book details the slum life that they lived in, these ghettos that were created specifically for Jews, with Nazi soldiers enforcing curfew and distributing paltry supplies for them all. They are forced to do many things that are disgraceful and endure abuses that make them feel less than human.
The authorities forced the Jews to live in these conditions simply because they could—they enjoyed tormenting the Jews under their care because the Jews were seen as less than human and responsible for the downfall of Germany. So, these authorities forced them to live in the small, cramped kitchen quarters.