when did the Holocaust begin?

Different sources give different dates for the beginnings of the Holocaust. Many say it began in the early- to mid- 1930s as Germans increased the discrimination and violence against the Jews. But many sources -- as this one -- date the beginning of the Holocaust to 1939, the start of World War II.

http://encarta.msn.com/encyclopedia_761559508/Holocaust.html

To find out when the Holocaust began, you can consult various sources such as books, articles, or credible online encyclopedias. In this case, the link you provided is from Encarta, which was a reputable online encyclopedia. According to the information provided on that page, many sources date the beginning of the Holocaust to 1939, the start of World War II.

When researching historical events, it is important to cross-reference information from multiple reliable sources to ensure accuracy and avoid any potential bias or conflicting perspectives.