It is. On a similar note, I was recently reading an atlas of American Indian history, and there were similar problems there. In the author's coverage of theories about pre-Colombian migrations to America, although they were willing to entertain some "alternative" hypotheses on this subject that have been raised by recent scholarship, they prefaced the whole discussion by condemning as motivated by "cultural superiority" early European colonists' speculations about whether the parallels between the Mound Builder Culture and Celtic mounds, Central American pyramids and Egyptian pyramids, etc. might reflect cross-cultural contact. They went on to add that such attitudes of "cultural superiority" are disputed by current opinions on the mounds' indigenous origins. Evidently many scholars cannot even consider the hypothesis of trans-Atlantic influence on pre-Columbian American culture without political correctness censoring their thinking.
I've/we've always heard we should "follow the money", and that may be part of it, but I wonder if some large, tender egos aren't getting trampled on right about now? I imagine a lot of careers and tenure have been built upon and intimately intertwined with the status quo. These folks should maybe develop a taste for crow; looks like they'll be dining on it before long.
FGS