The reason is that the term aligns with the forced removal of the Jews from their dwellings to bad conditions.
The reason for the name
The term "convoy" can evoke images of large groups of people being transported against their will, often under harsh conditions. This aligns with the forced relocation and transportation of Jews during the Holocaust.
The term emphasizes the collective experience of suffering rather than focusing on individual stories. It also highlights the systematic nature of the Holocaust and the immense scale of the tragedy.