"Throughout the war, Christians of all denominations have secretly aided the minority groups in Germany and the occupied countries. Not only have they ministered to the spiritual needs of these afflicted peoples, but they have also provided food, shelter, clothing, money, medical attention and protection..."
When the smoke cleared and all the bodies were buried at war's end it was believed that the "Righteous Gentiles and Holocaust Rescuers" in Germany only numbered 2,000; given the fact the number of church attendees in that nation numbered in the millions - 2,000 really doesn't seem like very many. More on this topic can be read here.