What is the right-wing ideological equivalent where its adherents would attempt to deplatform, smear, etc. someone for violating its dogma, and what is the dogma?
[0] Although not well-known enough. Good starting points might be the Chomsky's political books (they're extensively referenced - don't just take his word for things, read his sources too), and Scott Noble's documentaries: http://metanoia-films.org/