I believe that in the early 70s, a small percentage of America went crazy and got a lot of media coverage. Most Americans looked at the TV and said, “Those people are no good.”
In 2018, about half the people in America are crazy and they control the entire media. Half of America watch these people spout madness and they say, “See? Everyone agrees with me! Trump really is Hitler!”
You said it perfectly.
Exactly right. The media and educational institutions were not as biased as it is today which accounts for some of it.