Christians did not create Auschwitz (Nazism was profoundly anti-Christian) but without 1900 years of Christian hatred of Jews and Judaism it could never have happened.
I grew up with the message that the Jews have suffered over the past 2,000 years because they rejected Christ. Because they crucified God. That Jews are God-killers.
I was also taught that Jews are not true Jews. Christians are the true Jews. Christianity superceded Judaism. Jews today are therefore imposters, rejected by God.
The official Seventh-Day Adventist church in Germany assisted the Nazis in their isolation and persecution of Jews. Adventist leaders handed over Jewish converts to Adventism to the Nazis to be sent to concentration camps.
On the other hand, some individual Adventists in Europe rescued Jews.
If there was another genocidal targeting of Jews today, what would the Adventist church do? I view the Seventh-Day Adventist church as an essentially amoral organization. I think the church today would be as likely to assist in genocide (as parts of it did in Rwanda last decade) as to oppose genocide. As for individual Adventists, I suspect that perhaps one percent would be rescuers and perhaps one percent would actively assist in genocide.