Is Science Fiction in the hands of tyrants and thought police?

Stumbled across this blog post on the tyrany of thought police in science fiction today<br /><br />It feels like Political correctness running wild to me.<br /><br />breif excerpt post here:<br /><b>http://teaattrianon.blogspot.com/2014/05/science-fiction-and-thought-po… /><br /></b>full post here:<br />http://www.intercollegiatereview.com/index.php/2014/05/07/heinlein-hugo… /><br />blogger makes the case that Heinlein could not have won a Hugo award today.<br />