The railroads did not enable the Nazi genocides, they merely shaped them.
Rwanda killed a higher percentage of people, more quickly, without any advanced infrastructure. Without railroads the Nazis would have put the camps closer to the population centers or killed people where they lived. During that period the same technology and eventually even the same rails enabled the Allies to break the Nazis and free the remaining prisoners.
Rwanda killed a higher percentage of people, more quickly, without any advanced infrastructure. Without railroads the Nazis would have put the camps closer to the population centers or killed people where they lived. During that period the same technology and eventually even the same rails enabled the Allies to break the Nazis and free the remaining prisoners.
Verdict: Neutral.