This video says about itself:
14 January 2014
This is a clip from The Eternal Jew which was released in 1941 by the Nazi government of Germany. All German citizens were required to watch this film which was an apology by Nazis served up to the German people to excuse/make acceptable the wanton murder of over 6 million Jews (about 90% of the total Jewish population of Western Europe.) The voice in the background is the original narrator. …
Thus, the Jews were vilified in so many ways by the Nazis [to make] the people of Western Europe … object [less] to the Holocaust. Clearly, this is a very simplistic analysis of the Holocaust, but it is real. Think about how the white Christians of the American south believed in slavery, Jim Crow, and the idea that black people were inferior in almost every way to white people. You might want to find and watch some of the news footage of Birmingham, Alabama during the Civil Rights Movement.
In this clip from this nazi anti-Semitic propaganda film, at 3:30 the nazi comparison of Jews to rats starts.
Unfortunately, similar vile hate propaganda still exists today.
From daily The Morning Star in Britain:
MP calls for Mail apology over refugee rats cartoon
Friday 20th November 2015
In a letter to editor Paul Dacre, the shadow Treasury minister said the cartoon fuelled Islamophobia at a time when British Muslims “feel under particular threat of demonisation” in the wake of the Paris terror attacks.
He added: “More widely, myself and hundreds of thousands — if not millions — of others would respectfully ask that the Daily Mail considers its general approach to the portrayal of immigrants and ethnic minorities and considers the consequences for our society of its portrayal.
“It is my belief that, all too often, the Daily Mail lets down its readers and the general public.”