What's objectionable is that these types of self-important nitwit bores like Susan Douglas in the PBS trailer present the issue as if Walt Disney invented the concepts prevalent in American society circa 1948-1962. And not only did he invent it, he then shoved it down everyone's throats by forcing Americans to go to Disneyland.
Disneyland is no more an example of what we now find offensive (or even just funny) about American post-war society than any other successful enterprise of the time.
Ms. Douglas could flip through a random issue of Life Magazine from 1955 and find a hundred similar examples of white-washed culture of the era, but instead she uses Disneyland as her big example and presents it as if it was something unique for the era. It wasn't unique. Disneyland '55 was influenced by the era, not the other way around.
And then she has to have that snotty tone that most self-important lefty professors have, as if she is so brilliant and wise for explaining to us mortals that Disneyland was responsible for keeping women in the kitchen, Indians on the reservation, and black folks at the back of the bus.
Disneyland didn't do all that, it was just a fancy new kind of amusement park. And a wildly successful one too, which automatically draws the ire of people like Ms. Douglas.
Ms. Douglas in the PBS clip displays an old 1980's lefty opinion that just seems silly and tired in the 21st century. America was racist and sexist and oppressive? Blame Disneyland!