This man has taken a lot of hell for telling the truth.
He went to the source, read for himself, the papers, the documents, the records, the diaries of important German officials, in German, wrote books of the truth of the underhanded politics which kept World War 2 going for years, long past when it could have been settled.
He wrote the truth, and he has never been forgiven for that by the ones who are so heavily invested in the big lie.