Billions of users. I would imagine it is the entire spectrum of political and cultural opinions. Pro-live/Pro-choice. Religious/Atheist. Traditional/Multicultural.

Your choice of words is demonstrative of your political point of view.

I would have used the words "anti-abortion", not pro-life, and "Monocultural", not "Traditional".

But there is bias in all of us.

Ditto

Is there bias in objectivity even if expressed by others?

Is there anything more dangerous than someone who views themselves as objective while sanctimoniously berating other people for having "biased" views?

"Why do you see the speck that is in your brother’s eye, but do not notice the log that is in your own eye?"

I asked a question that it seems you've answered with a question. This is the Internet, so the only real "rules" are related to the physical limitations of the hardware in use. As is demonstrated in the article, other rules are more subjective in nature.

Yes, there are things more dangerous than someone who views themselves as objective while sanctimoniously berating other people for having "biased" views. I can name a great many.