I have done a fair bit of research into the 'Holocaust' (capital 'H' since 1945) myself including reading/watching some of the same material you sourced. A particularly good book (I thought) on the subject is called "Debating the Holocaust" by Thomas Dalton. It used to be available on Amazon up until a few months ago but freedom of speech only goes so far don't ya know ;-)
The authors website is http://www.debatingtheholocaust.com/ with the contents, introduction and chapter 1 being viewable on the site.
Such is the emotion and passion that this topic brings about in people, I didn't want to post anything on Steemit about it in case my reputation took a hit or I was voted down. Glad to see someone has more balls than me (and your rep doesn't appear to have suffered either).