Antisemitism or hatred of Jews as “ism” is too much credit for this type of thinking about a multifarious community.
One of the most well know and prominent Jew Haters was Martin Luther who wrote the “Holy Book” Jews and their lies. Besides he also showed hatred for the poor peasants in the peasant wars of 1525.
It is not too hard to see the link with the anti-clerical Bolshevist who in essence wanted equality and a better life for the peasants. At least the Bolshevist/Communist demonstrating in German wanted livable wages.
Here is Shirer who live in Germany and experienced the rise of Hitler first-hand:
“It is difficult to understand the behavior of most German Protestants in the first Nazi years unless one is aware of two things: their history and the influence of Martin Luther.* The great founder of Protestantism was both a passionate anti-Semite and a ferocious believer in absolute obedience to political authority. He wanted Germany rid of the Jews and when they were sent away he advised that they be deprived of “all their cash and jewels and silver and gold” and, furthermore, “that their synagogues or schools be set on fire, that their houses be broken up and destroyed… and they be put under a roof or stable, like the gypsies… in misery and captivity as they incessantly lament and complain to God about us”—advice that was literally followed four centuries later by Hitler, Goering and Himmler.”
― William L. Shirer, The Rise and Fall of the Third Reich: A History of Nazi Germany
Also my family and others met grieving mothers at the time who "at least had a consolence that there sons went straight to heaven as they fought the “Jewish controlled Bolshevists”. To my grandparents it felt like they were stuck in another Childrens Crusade run by nutcases who only thought about the afterlife.
This logic might explain that Germany unlike the much smarter/braver Italians did not stand up enough against their leaders and kept suicidally fighting for a clearly doomed and utterly reprehensible cause.
With other violent organizations like “IS” in E.g. Iraq and Syria it will be easier to accept that European Church organisations are not comprised by clean men and women. Also the power of the “afterlife in heaven” is a tempting prospect for the “religiously indoctrinated”.
Note: Of course there were brave German resistors and people giving up and also victims of the Regime like Jews/Gypsies/handicapped etc etc. Besides Hitler was lucky to survive Stauffenberg and other attempts.