Believe this one. My maternal grandparents alone counted over 100 of their relatives who were murdered in the Nazi death factories. I even have an eyewitness report of the murder of my grandmother's uncle, of the conditions surrounding his murder, and of the fate of all of the Jews of his town (located 6 miles from the death factory at Treblinka). Suffice it to say that most of them failed to survive 1941, that none of them survived 1942, and that it was the deliberate policy of the German occupiers that this be so.
My wife's uncle was in Bergen-Belson as a young teenager, and saw his father and brother murdered by the SS. He escaped by faking death, and lying among dead bodies for many hours. He has numbers tattoed on his forearm, like many others that I've met over the years.
Don't tell me that this genocide didn't happen, that it was a figment of someone's imagination - I've spoken with too many actual victims of Hitler and his genocidal followers, all of whom were overwhelmingly credible. This historical event has not been distorted by most historians, unless you count those who deny that it ever took place.