"The book's vagueness—almost no names, dates, or issues are specified—has been one key to this wide-ranging success. The purportedly Jewish authorship also helps to make the book more convincing. Its embrace of contradiction—that to advance, Jews use all tools available, including capitalism and communism, philo-Semitism and antisemitism, democracy and tyranny—made it possible for The Protocols to reach out to all: rich and poor, Right and Left, Christian and Muslim, American and Japanese."
https://en.wikiquote.org/wiki/The_Protocols_of_the_Meetings_of_the_Learned_Elders_of_Zion