I'm honestly curious to hear holocaust deniers explain where 6 million Jews mysteriously vanished to.
It wasn't just Jews in the Holocaust. Most of the victims were Jewish, but there were millions of non-Jews. People don't give the non-Jews attention.
The term Holocaust refers specifically to the genocide against Jews, and anyways nobody's ever denied that the Germans shot people in Eastern Europe during Hitler's reign there. (though the term is not limited to those killed in the death camps - the six million figure includes very many whose murders were not at all of a different quality from so many of the Nazis' other murders. Exterminations of whole Serbian or Belorussian villages in retaliation for partisan attacks, say.)
Of course, when we say 'Holocaust denier', we include those who obsessively relativize the Holocaust, foolishly and against the overwhelming bulk of the evidence still try to quibble about the exact numbers, etc. Or just show glee at pointing out the bits of the story rarely told (like the despite mutual mistrust often reasonably good working relationships between Nazi authorities and Zionists - Ahmadinejad's Holocaust conference was mostly about this sort of stuff). Especially when we have reason to suspect an antisemitic animus.
Anybody who pretends that Hitler was anything but a Roman Catholic or that anything short of a vast majority of his henchmen were Conservative Christians - and primarily Protestants - has rosary beads for brains. That Hitler would have liked the Pope and his Bishops to be even more subservient than he really was - as subservient as the German Lutheran Bishops actually were - ; that fringe parts of the SS endulged in Neo-Pagan rituals and the whole organization liked to use symbols ripped from Germanic pagan traditions; that there were some Nazis (not entirely fringe) who quit the Church and defined themselves as
gottgläubig ("theists"? Though the God referred to is explicitly the Abrahamic God. In Germany these people largely rejoined in the early 50s, though in exile, Adolf Eichmann called himself
gottgläubig when on trial in Israel), are all true but do not affect the fundamental character of the movement and never reached the ears of the majority of the German people.