The Nazis intended to kill every Jew in the world. They would not have stopped. They had set up an industrial process, used resources they could not spare to keep on killing right up to the end of the war. Arek Hersh wasn't liberated because Germany decided to stop killing Jews. He wasn't liberated because a merciful god looked down and took pity.
He was liberated by young American men with rifles backed up by the industrial might of an aroused nation that sent bombers, fighters, tanks, ships, machine guns, flamethrowers, artillery, and every other possible weapon to Europe to kill Germans and destroy their ability to wage war.
If you're going to remember the liberation of the Nazi death camps, remember who liberated them and how, and what it cost.