The Holocaust is a religious story that is extremely harmful to the cause of nationalism (it does help Jewish nationalism). If you defend it, you are doing the Globalists & totalitarian left a favor. The evidence is fraudulent, nonexistent, or is evidence of the contrary. People are taught Holocaust happened as children. Most are content with subsequent affirmations in the form of authorities' proclamations, pictures and videos of bodies, former inmates saying it happened. The main Nuremberg post-war trial practically declared Holocaust true before the trial started, and the trials that followed had to treat the conclusions of the first trial as facts that cannot be disputed. Why? The photos and videos are of inmates who died of disease, malnutrition and bombing. US army pathologist performed autopsies on the bodies and found none that were gassed. To this day those corpses are falsely presented as victims of Holocaust. The "survivors" were convinced of the Holocaust being true after being TOLD it is, NOT based on what they saw. Very few insist on having witnessed mass murder. There is nothing special about the rooms that are the alleged gas chambers -- they are regular rooms. There are lots and lots of cases of falsified evidence, missing evidence (e.g. bodies or ashes) and suppression of evidence to the contrary (e.g. the camp inmate records from the International Tracing Service).
But what happened to all those millions of Jews? They were sent to a camps in Poland, after which they were sent to other camps or deported to Ukraine, Russia, and Baltic countries as part of Operation Reinhardt. Furthermore, there was mass emigration to the US, Israel (Palestine) and elsewhere before and after the war. The Soviets also evacuated most Jews from the areas with the highest concentrations of Jews in Europe, East Poland and Western portions of USSR, further East in response to German 1941 offensive. Up to 200 thousand Jews did die in camps of disease as a result of gross negligence and, at the end of the war, the destruction of German infrastructure by allied bombing. But why so many Jews said they lost friends or relatives? Many were separated and did not reunite after the war, often because they ended up on the other end of the Iron Curtain or because they assumed the person/people in question were murdered.