Impossible to understand

Visit to Auschwitz-Birkenau concentration camp in Poland.

It is simply impossible to understand how a group of human beings could commit such systematic and large scale torture and murder.

The scale of the cruelty beggars belief. The most harrowing room is the one that contains tonnes of human hair that was stored in sacks and was destined to be used in the textiles trade.

It's hard to find the words to make a blip out of this.