Re the ridiculousness of the Daleks:
I’m not sure people realize how much the press, especially British and American, mocked Hitler throughout the 20s and even 30s as being idiotic, pathetic, comical — too silly to take seriously. (Look at how P. G. Woodehouse’s Roderick Spode…in a 1938 novel!)
I’m not a historian, and won’t make a judgement about how much the world regarded the Nazis with fear vs mocking vs attraction, but surely these are all ingredients.