It's patently clear from Mein Kampf that Hitler heavily weighed religious judgement on the Jews and the "race" issue in general. He believe in the Creation myth, saying that Jews as lower races evolved from apes, while Aryans are "image of the Creator". How the fuck is THAT not a religious base? Where have you seen a lack of religious motivation in Hitler's writings, especially in Mein Kampf? It's chock full of religious bullshit about "Creator" and "creation", "lord's image", "Lucifers" and "devils" as Jews and Bolsheviks, but that's it.
Hitler had a Catholic upbringing, and believed throughout his life that he was divinely inspired, talking openly about "Providence" (especially after June 1944, but that's another matter). None of that is in dispute. As I said before, I'm not motivated by any apologetic motives, and Hitler would have certainly called himself a Christian - he believed that it was a vital part of German culture and identity. The question is whether that religion had any affect upon his political ideology and anti-semitism.
Religious anti-semitism, as I've said before, drew from two linked beliefs - that the Jews rejected Jesus - specifically, that their adherance to their religion represented a continued rejection; and that the Jews killed Jesus. This meant that if Jews were to convert to Christianity, they would be fine - they were no longer rejecting Jesus, and by accepting him they would be forgiven all their sins - including killing him.
Hitler, as noted above, rejected outright the idea that the Jewish religious was significant, and pursued Jews as a race - included intermarried Jews, converted Jews and assimilated Jews. He also implicitly rejected the deicide charge (due to Higher Criticism, as mentioned before), and did not use it as a rhetorical tool (despite its obvious utility). He thus rejected the bases of religious antisemitism.
When he uses religious language in MK, and most of his later speeches, he is imposing religious terms onto his external, racial-nationalist anti-semitism. Politicians throughout the world spoke of God and used religious language in a way that sensible politicians do not do today. For example, Churchill said:
I can say: It is to wage war, by sea, land and air, with all our might and with all the strength that God can give us; to wage war against a monstrous tyranny, never surpassed in the dark, lamentable catalogue of human crime.
and
Behind them - behind us- behind the Armies and Fleets of Britain and France - gather a group of shattered States and bludgeoned races: the Czechs, the Poles, the Norwegians, the Danes, the Dutch, the Belgians - upon all of whom the long night of barbarism will descend, unbroken even by a star of hope, unless we conquer, as conquer we must; as conquer we shall.
Today is Trinity Sunday. Centuries ago words were written to be a call and a spur to the faithful servants of Truth and Justice: "Arm yourselves, and be ye men of valour, and be in readiness for the conflict; for it is better for us to perish in battle than to look upon the outrage of our nation and our altar. As the Will of God is in Heaven, even so let it be."
and
What General Weygand called the Battle of France is over. I expect that the Battle of Britain is about to begin. Upon this battle depends the survival of Christian civilization.
I don't think that you can use these, and the myriad other examples (I quoted from three of his most famous 1940 speeches) to argue that Churchill's resistance to Hitler was based on his religion.