I agree with Halo on this.
It's history folks, remember it but look forward to the future.
Hindsight is a wonderful thing, lets not forget that had the rails been destroyed the Nazis may have just simply shot any Jews they caught, immediately solving the transportation problem and ultimately reducing the survivor count once the camps were liberated.
Harsh I know but like I said, it's history. Now all we can do is either frustrate ourselves with futile re-evaluation or we can learn from the experience and move on.