Flat Earth and on three (Pratchett: four) elephants, the fire of the Inquisition, Nazism... Yes, the crowd can not be wrong. Most accept the opinion that will be imposed on them.
Now a huge number of media systems, which can cleverly manipulate opinion. It is necessary to evaluate everything with a sober mind.
Agree with you. The media so impose on people the opinion that they think this is their idea.