Propaganda specialists.

Six million Jews were killed during the Holocaust. The six million number has been known much longer than the Holocaust. Here are 140 occurrences of the six million number relating to persecuted Jews before 1945, starting in the year 1900. Mostly from newspaper articles.

Source: Six Million – 140 Occurrences Of The Word Holocaust And The Number 6,000,000 Before The Nuremberg Trials Began