Allegations that Chompsky was unfair to Dan Everett?

Dan Everett is a primarily media-phenomena and fraud (in a whole variety of ways). His claims about the Pirahã has been debunked at this point. The main thing is that Everett used the tactic of presenting himself as an outsider challenging a "great" man (who naturally has many enemies). In considering Everett's dubious claims, take into account that Everett isn't an expert on tropical languages but a missionary who got an impression of one language and leverage this into an entire career.