I have noticed that Holocaust deniers almost invariably turn out to be very anti-Israeli, which casts doubt on their claim that Holocaust denial is not anti-Semitic.
What turns out to be the case is that the great majority of Holocaust Deniers are anti-Semitic idiots even without the the anti-Israeli stuff.
Of course some of them do in fact deny that anti-Semitism has anything to do with Holocaust Denial, which is a simple lie.
Among themselves and when they are with the "like-minded" they let their hair down so to speak and the crap pours out of their mouths. Further even with the denial of anti-Semitic motivation , again and again, we see the hatred and vitriol pour out sooner or later. Just look at the past Holocaust Denial threads on this forum for massive examples of hatred and bile.
Thus we hear about the all powerful "Jew", who for purposes of conquest and filthy lucre has concocted the "lie" of the Holocaust. We hear about "their" control of media, academia etc., that enables this all powerful cabal to foist on the world the "lie" of the Holocaust. Hoilocaust Deniers all too frequently see themselves has brave fighters against an all powerful, even Satanic, foe and many do not even try to hide their adoration etc., of National Socialism and Hitler.
Holocaust Denial emerged shortly after World War II from the pens and mouths of Anti-Semites who were desiring to restore respectability to their paranoid fantasies and hate. Needless to say this didn't look very good so later Deniers have been trying in a half assed manner to hide their, the great majority of the time, real motivations. Thus Holocaust Deniers, explicitly and implicity accept the paranoid, hateful nonsense in the the infamous forgery, The Protocols of the Elders of Zion, that view Jews has a sinster, evil group out by subversion and treachery to try to conquer the world and rule it through their alleged control of media, finance etc.
Thus Denier's almost always view themselves has the Sons of Light fighting the Sons of Darkness and the "Jew" is the evil "other". They view, most of the time, Holocaust Denial has part of the fight against the evil "other" that is the "Jew".