I believe that many ‘liberals’ back then were more in the way of classical liberalism. They were innovative, and more in tune with traditional American Principles than many others were, at the time.
At some point, the ‘liberals’ lost their way, and fell into becoming dictatorial, censorial, and intolerant LEFTISTS.
I remember when people would feel completely safe in putting a Pro-Trump sign in their window, outside of their house, or on their car.
Now, the mindless, ‘liberal’ NAZI component of our population has made us all afraid of freely expressing a sincere personal opinion.
You are correct. That was a good description of how they have fallen from favor.