The paranoid in the film represents the anti-communist paranoia, which reflects the tyranny of the post-war McCarthy era. People are afraid of those "pod people" at first and they try to do something to resist them, like asking the doctor for help or trying to find the manipulator behind, but gradually they accept the fact and when they become fake human beings themselves, they even begin to turn other normal people into “pod people.” This situation is a metaphor of the social phenomenon in McCarthy era when people made accusations of disloyalty, subversion, or treason without proper regard for evidence. I think the circumstance and ambience are similar to what happened in the Culture Revolution in 60s China. At that period, people are crazy at removing capitalism out of the country through violent class struggle.
At the end of the movie, Dr. Miles Bennell is regarded as a psychopa…