Ah, but this is not a mere matter of Manutdglory's bias. If this were about his clear dislike or resentment of California Supreme Court decisions, that would be bias. This instead appears to me that he is insisting that a  number of verifiable, well-documented facts - here, the Prop 8 ballot title wording, the history of how that title came to be, and the history of the law that established the right to marry in California - must be excluded from the article or even from discussion here. That is not bias, it is something more than bias. I'd call it a phobia.