It isn't just a question of the word, but of using it as a rhetorical weapon in an ideological argument. That leads to flamewars so when we see people doing it we ask them not to.

It's also not ok to use HN primarily for political or ideological battle, since that isn't the purpose of the site. Obviously some topics are more political and commenting in such threads is fine, but it's not to use an account primarily for it.