Biologically humans are all similar. Mentally and even more so emotionally, we are vastly different.
Ok, was Adolf Hitler right?

How does Propaganda works if we are all emotionally different?
People think they are special and that they figgured it out..
we are easy to manipulate and have the same emotional weakpoints.
Tell your future wife that she is ugly but you take her anyway..would not work.
We are not so special as we think we are.