I have never denied that the Holocaust happened.
It is the Holocaust Industry(1), (2) that grossly exaggerates and crassly exploits the Holocaust for cash and a license to kill Palestinians that should have a credibility problem among thinking people.
Even the term "Holocaust denier" is a fraudulent misnomer parroted by intellectual lightweights and fabricated by a "scholar" so ignorant (D. Lipstadt) that her $30 Million legal team refused to let her open her mouth during the slander trial with David Irving.
The Holocaust happened. I know, because my Dad liberated a concentration camp and had nightmares for the rest of his life.
Everything else, you can take a healthy cup of STFU.