It is not a very good sentence.
Interested in Language
In the following sentence, why "be" believed is used, rather than "are/is" believed, or "is/are" believed "to" be susceptible....?
The half-educated, be believed, would be susceptible to any intellectual fad that they might use to demonstrate their superiority to the masses.
Typo for "he believed"?
I'm not a teacher, but I write for a living. Please don't ask me about 2nd conditionals, but I'm a safe bet for what reads well in (American) English.
And the number of instances on Google is testament to the amount of plagiarism, or at least unread copy and paste, that occurs.