“Holocaust deniers are the flat earthers of history. They attack one of the most well-documented genocides in all of human history using pseudoscience, conspiracy theories and bigotry. They have a poor grasp of how science works as well as historical methods, they quote scientists and historians out of context, and they hunt for alleged anomalies while ignoring the massive amount of consistent historical and scientific evidence. It is tempting to view Holocaust denial as just another pseudoscience, but because it involves denying a genocide and extreme ideology, it is in many ways much more severe than many other forms of pseudoscientific nonsense.
Behind Holocaust denial is often misguided and irrational ideologies. This can include antisemitism, religious fanaticism, and even staunch political beliefs about the Middle East. There are many things that makes Holocaust denial scary. Denial is the final part of a genocide, it is an intense reject of history and evidence and its threatening grasp can be felt around the world.”