It's Christian insanity driven by their hatred of the Jews.<quoted text>
Are you suggesting that if the belief were irrational or self-contradictory, that it would not be held by a Christian?
Jews are called "Christ killers" by Christians for a reason. Here was a very famous German Christian that undoubtedly influenced Herr Hitler:
MARTIN LUTHER ON THE JEWS
 "The Jews deserve to be hanged on gallows, seven times higher than ordinary thieves"
 "We ought to take revenge on the Jews and kill them."
 "The blind Jews are truly stupid fools"
 "Now just behold these miserable, blind, and senseless people."
 "eject them forever from this country"
 "they are nothing but thieves and robbers"
 "What then shall we do with this damned, rejected race of Jews?"
 "Such a desperate, thoroughly evil, poisonous, and devilish lot are these Jews"
 "They are the real liars and bloodhounds"
 "We are at fault for not slaying them."
 "I shall give you my sincere advice: first to set fire to their synagogues or schools and to bury and cover with dirt whatever will not burn, so that no man will ever again see a stone or cinder of them."
 "Second, I advise that their houses also be razed and destroyed."
 "Fifth, I advise that safe-conduct on the highways be abolished completely for the Jews."
 "Burn down their synagogues, forbid all that I enumerated earlier, force them to work, and deal harshly with them"
 "If this does not help we must drive them out like mad dogs"
 "If I had to baptize a Jew, I would take him to the river Elbe, hang a stone around his neck and push him over with the words `I baptize thee in the name of Abraham'."
The Church passed various laws and enactments which stripped away any rights that the Jews had. Christians accused the Jews of the most vile and evil crimes, leading to the insane idea of the "blood libel" - something so evil and twisted it could only have come from the Christian Church.
Try looking up "Host Desecration" if you want a laugh at further Christian stupidity and ignorance. We all know the cannibalistic side to those Christians who genuinely believed that the crackers they would eat transformed into the body of Jesus. Such was the level of Christian insanity, they also believed the Jews would want to torture these crackers in an attempt to hurt the body of Christ.
Both the Blood Libel and the Host Desecration led to the deaths of thousands of Jews.
Didn't the Catholic Church charge the entire Jewish people with deicide? I'm sure that would have fired up even greater levels of hatred in those christian heads.
I'll say it again: No wonder Hitler targeted the Jews. He was simply taking the hatred and murderous intolerance of the Christian Church to new levels of insanity.