Maybe its because they fear what technology can do to the world. Maybe loosing their job to a machine or worried that a "certain idea would spread over the world and it would have a negative impact on that person and others." Or maybe it's because certain Americans don't believe in innovation or technology and they feared a progression in it. All depends on the American.
Hope this helps.
I have to say quite impressive, all of your answers are correct.
I just had to leave this here, sorry I couldn't answer the question.