That's a blatant lie and you know it.
I don't think it is. They had a problem with lice spreading typhus in the camps. They shaved hair off (hence, piles of hair), did washing, killed lice on clothing and mattresses using Zyklon-B, and whatever else to reduce this problem. It's kind of an odd that they'd be doing this if they're just trying to kill everybody.
At this point the United States is obligated to have Hitler and the Germans be pure evil, because if they weren't, then that would make the United States seem bad instead of the great heroes who won WWII. That would have ruined the morale of the general population. At this point, though, anyone who has any idea what's going on has to put a starting date on when the USA turned bad. I have backed mine up to 1913. Maybe it needs to go back farther. The population was still decent back then, but the government had turned rotten.
People like to think in terms of good guys and bad guys like the world is a cartoon. I tend to think of nations as if they are criminal gangs competing for wealth and territories. With the Crips and Bloods, nobody is asking who the good guys are. Of course any nation tells their own people they are so good, noble, and righteous and their war opponent is so evil, bad, and horrible and guilty of this and that atrocity.
Now that I don't believe the propaganda about Hitler being the most evil man in the world, I have thought about who that man might be. I realized the most evil people are probably ones we don't know about. They don't want any attention and lurk in the shadows with great wealth and with this wealth they manipulate the rulers of the world. Perhaps some of them are somewhat known like the Rothschilds and Warburgs. There are others you can find out about if you research. These people have been excluded from the official lists of richest people in the world, so you end up with names like Gates, Musk, Bezos, etc. The most evil people aren't the rulers of nations. They must be communing with Satan and other devils. The same way God manifests powerfully to his elite followers, these evil people must be meeting with the devil and company. This will be done in secret and many won't even believe this to be true. Like their master, the devil, they hide as much as possible and want people believing they don't exist. Ultimately, Satan is the god of this world as Jesus said.
Aside from this there is the issue of how evil and how much power someone has. Someone could be completely evil and yet have no power with which to express it with. People try to pick most evil people from rulers of nations since they have obvious power. Those who control money, though, have power without the publicity and the awareness that they can control and influence things.