Your math is deeply flawed. It assumes every Jew that was murdered had to be cremated. In reality many were shot dead by roaming SS squads in occupied territory, and had their bodies dumped into mass graves, and many more died from Tuberculosis and other deasies after being herded into camps like cattle, being overworked, and denied basic nutrition and were also buried in mass graves.

Mass graves of Jews in occupied territory, are still being discovered as recent as last year.

What is even more troubling about your cognitive dissonance is that Hitler is literally recorded on Video threatening the "annihilation of the jewish race from europe" in a speech he gave. Even though he said that he would do it, and german veterans admitted they did it, you think its all a lie?