German soldiers as well as police members took pictures of Jewish executions, deportations, humiliation and the abuse to which they were also subjected. According to researchers, pictures indicate the consent of the photographers to the abuses and murders committed. "This consent is the result of several factors, including the anti-Semitic ideology and prolonged, intensive indoctrination". Archival evidence as to the reaction to policies of racial extermination can also be traced in various letters that survived the war. Many of these archived letters from "Wehrmacht" soldiers often reflect the intensive indoctrination soldiers underwent. The following quote is from a letter written by a noncommissioned officer in the Wehrmacht who wrote home from the Russian front in 1941: