Valdemar II
Banned
If there is an ATL economic boon big enough to cause a labour shortage, Germany might very well still hire foreign guest workers. But in TTL it wont have any qualms about actually making them go back once their contracts are over or requiring, that a guest worker learn about German language and customs before being issued a work visa. I´m not talking about OTL Present Day Saudi style borderline slaves, but something akin to OTL Present Day South Korea.
Unlikely the migrant community would likely be treated more as they're in other European countries today, but both the Arabic and Turkish community is likely a lot smaller, and we would likely see East Europeans* as Gastarbeiters instead.
*Especially Poles, Balts, Romanians and Jews.