There's a pretty good account of the laws and attitudes leading up to the holocaust in the autobiography" The man without a shadow" . There were a few years of increasingly persecuting laws before the ghettos. The Jews' attitude mostly stayed at "It'll get better, we'll deal with it until then" untill it was too late. There was a brief period of "send the kids away", then "Oh s###". By then, only a few countries, mainly in South America, were accepting refugees.

They were convinced that "civilized Germans" had limits that they would not exceed. The modern expression is "Frog in a pot".