It is shaky because the liars lied and now their lies are coming back to haunt them and they're suffering from extreme angst.
The thing about "Holocaust" is it means different things to different people, so I always ask for them define it in no uncertain terms and the not-so-odd thing is none of them ever do. They simply runaway and avoid, deflect, or flounce.
Did the Germans round up Jews and put them in camps? Absolutely they did.
Did the Germans round up Jews and murder them? Absolutely they did. The best book you can ever read on the subject is Ordinary Men: Reserve Police Battalion 101.
Reserve Police Battalion 101 was made up of police officers from the city-State of Hamburg and surrounding area, and like all reserve police battalions, these were men too old to be drafted but still young enough to serve. These reserve police battalions were sent to the Eastern Pale or Eastern Territory (whichever you prefer) in Poland and parts of Belarus. They went from village-to-village rounding up Jews and shooting them.
We know that because there were eye-witnesses, Poles, who either saw the mass shootings (now you know why certain acts of violence in the US are labeled as "mass shootings") or buried the bodies under German orders, and then the survivors of these police battalions also admitted it, and then we have the reports filed by the company commanders and battalion commanders detailing the number of Jews murdered in those villages, and with break-downs of the number of men, women, and children.
So, it did happen. But the real story is why those men who had wives and children did those things and if you don't believe it could never happen again, you're wrong, because it certainly could.
When I was in high school, we were forced to accept without question that 6 Million Jews died and 4 Million were at Auschwitz and 2 Million in the East at Sobibor, Treblinka, and Chelmno.
Two decades later I learn that 4 Million could not have died at Auschwitz, because there were never more than 4 Million there during its existence, and now the number is "officially" 1 Million something.
The idea that Auschwitz was a death camp is preposterous. Read about Anne Frank. Her and her father hiding out in the Netherlands are caught and put on a train to Auschwitz. When the train arrives, a typhus plague is sweeping the camp so to save Anne Frank's life she's put on a train to Bergen-Belsen.
And her father? He sustained a foot injury (either a laceration or puncture wound) and is not sent to the camp, instead he's put in hospital and given penicillin to stop the infection from killing him. even though penicillin is in short supply and desperately needed by German civilians and soldiers, not to mention Allied POWs entitled to medical treatment under treaties.
Anne Frank died a while after arriving at Bergen-Belsen when a typhus plague swept through the camp but her father survived Auschwitz.
Ramped up Allied bombing destroyed sewers, storm-water run-off systems, waste water treatment plants, and water treatment plants and that's what allowed cholera, dysentery, and typhus to run rampant.
Cremation is the only way to kill typhus. When Cincinnati had a typhus plague in the 19-teens, they'd stack the dead like cord-wood in the streets, douse the bodies with diesel and burn them. That's how it has to be done otherwise typhus gets into the ground water or up on the surface and gets airborne.
Gassing people and cremating them is just the hysterical rantings of frightened Judenpolizei, the race-traitor Jewish police lording over their brothers and sisters for better living conditions. The war's over and now they're outcast and cut-off from everything they know unless they can come up with a really good excuse to deflect.