Egregoros

@genmaicha @eee It's a very pragmatic approach. The country needs manpower, so you round up the undesirables and put them in work camps, instead of dedicating even more manpower to reducing your industrial output by killing this resource. You make the work camps livable so your workforce is actually productive. Extermination camps are a privilege only a nation with excess manpower and resources can afford, since they're a massive resource sink that produces nothing. After you win, you get rid of them either by death or by simply sending them somewhere far away since you already have them all gathered together.
It checks out with the deals made between Germany and the arabs and the pre-war deportations, as well as the rethoric of "we don't want them here", and general German pragmatic attitude. Deporting them to the middle east seemed like a decent enough solution, because who would think back then that, if deprived of their positions, titles, wealth, and sent to another continent, they'd still be able to do any harm? It wasn't logical to think they'd dedicate entire generations to vengeance rather than think "ok they caught us back there and are wary to our tricks, it's much safer to start over here in the middle east and appreciate that they seem unwilling to chase us all the way here". Kinda like moving states because the cops are out to get you in one, but are neutral to you on another and the former state's authorities won't cross over the border to get you.

It all went to shit when Germany ran out of food of course, why the fuck would you feed your work camp prisoners properly when your total available food isn't enough to feed your own civilians and army? but the food scarcity is something done by the allies as part of the war strategies to weaken Germany, not a deliberate choice by them. They'd be incredibly stupid not to allocate the little food they had to anyone other than their own people.

Much like with the Roman conquest of Jerusalem, the sheer evil and depravity they were capable of was not known at the time, and so the "solutions" were not as complete and thorough. It was only after they were allowed to act without restraint or consequence that people really saw their nature.