Answer:
Oscar Schindler was born and brought up in a Catholic family and grew up in a neighborhood of a Jew family. As to the question, there is no exact reason, but it is considered that because of his belief and bond with the Jewish family he went to the extreme side of saving his Jews workers while risking his life.
Step-by-step explanation:
Oscar Schindler was a German Catholic who worked as a spy and war profiter. During World War II, Schindler traveled to Poland and started an enamelware factory.
His factory would produce goods to support the German military. He hired Polish Jews as they were low waged workers but eventually developed a connection with them. This led him to save his workers from concentration camps. He began bribing SS officers with the money he earned and saved more than 1,100 Jews from going to concentration camps. This also involved great risk to his life.