In German, i.e. the language of the work and death camps, Deportation is different from Abschiebung (≈off-pushing). Deportation in German still is associated with the Nazi regime, while Abschiebung is being normalised successfully.
AFAIK, during and after the Second World War, the anglophone world learnt about the German crimes at least partially through a German language lense, so my guess is that the English word deportation was mingled with the meaning of the German word Deportation and the meaning of banning individuals from a place after due process.
In German, i.e. the language of the work and death camps, Deportation is different from Abschiebung (≈off-pushing). Deportation in German still is associated with the Nazi regime, while Abschiebung is being normalised successfully.
AFAIK, during and after the Second World War, the anglophone world learnt about the German crimes at least partially through a German language lense, so my guess is that the English word deportation was mingled with the meaning of the German word Deportation and the meaning of banning individuals from a place after due process.