The wide-spread mass executions of all concentration camp prisoners did not become very commonplace until later into WW2. Initially they were a captive labor force, and identification numbers can help simplify the organizational burden. As their fortunes turned in the war, though, they enacted what became known as their Final Solution, which ramped up over time.
They had other solutions before then. For instance, one idea was to literally ship them all to Madagascar. So, Madagascar would basically be Israel today. This plan was always problematic due to the power of the British Navy though, and once Rommel was turned back from his advance towards the Suez at El Alamein, simply became impossible.
The wide-spread mass executions of all concentration camp prisoners did not become very commonplace until later into WW2. Initially they were a captive labor force, and identification numbers can help simplify the organizational burden. As their fortunes turned in the war, though, they enacted what became known as their Final Solution, which ramped up over time.
They had other solutions before then. For instance, one idea was to literally ship them all to Madagascar. So, Madagascar would basically be Israel today. This plan was always problematic due to the power of the British Navy though, and once Rommel was turned back from his advance towards the Suez at El Alamein, simply became impossible.