You and the "i kan reed" are both right. You humans in general have a very strong mentality to act as "herd". And is very easy for psychopaths take control of these herds and it is very difficult for reasonable people to avoid this, since to convince a flock that they are doing something wrong is necessary that the flock can be able to think, and this is beyond the capacity of the herd (as many have already noticed, an individual is more intelligent and reasonable than a group of humans).
I'm seeing a great example of that right now in my country's elections (Brazil), where the flock moved by the local media (newspapers and television) wants to kill and segregate all who do not conform to the "shepherd" (the media). And the situation is so bad that if the flock win, I may have to leave the country to stay alive.