The twirling of the lariat is the hardest part to master, because many people have a hard time learning how to make the twirl happen with their wrist. Move only your wrist, not your whole arm. Think of your wrist as an axle, as if the rope was a wheel revolving around your wrist.
Aushwitz killed over a million people by the end of WW2, and was one of the worst camps to be sent to during the war. The pure evilness of that went into these killings was shocking, and children were often subjected to the worse of these tortures because they could not defend themselves.
Auschwitz, one of the most famous concentration camps, was set up specifically for this purpose. The gas room was actually right underneath the crematorium. Once they gassed the people, they would send the bodies in an elevator straight up towards the crematorium where the bodies would be burned.