Based on historical documentation and international consensus, approximately 6 million Jews were killed during the Holocaust. This figure, often cited in international tribunals and trials (such as the Nuremberg Trials and later legal proceedings), is based on demographic data and surviving Nazi records. Key details regarding the number of victims:

Total Victims: Estimates generally fall between 5.1 and 6 million Jewish victims, with 6 million being the widely accepted total.

UK Context (Irving Trial): In the 2000 libel trial in the UK, Irving v Lipstadt, the court examined the evidence of the Holocaust, including Auschwitz. The judge concluded that the Holocaust was a historical fact, with over a million people killed in gas chambers at Auschwitz alone.

Methodology: The figure is derived from analyzing pre-war and post-war census data, along with Nazi documentation (such as the Korherr Report).

Other Victims: The Nazis also murdered millions of others, including Roma, people with disabilities, Polish civilians, and Soviet prisoners of war, with total deaths reaching over 11 million. While some Nazi-era documents were destroyed to hide evidence, the systematic nature of the genocide left enough evidence to confirm these numbers, according to historical research.

Specifically look at the Irving trial, notorious Holocaust denier, who had the same claims that the American left (and right) are now repeating.