If you haven't seen the documentary "The Social Dilemma" on Netflix yet, it is definitely worth a watch. There were a few key takeaways for me, that I think about every time I try to research a topic online.
1. Any digital service that is offered for free (any free app), browser, etc. is not a product. YOU are the product being sold to advertisers.
2. The "purpose" of social media platforms like Facebook, Youtube, Instagram etc. is to keep you engaged as long as possible. The longer you are engaged, the more valuable you are as a commodity because they are able to serve more ads to you.
3. Google tailors search results that keep you engaged, based on your personal browsing history. Google has no interest in "getting you the correct answer". If you are trying to find out what is "true" by typing in a question, the results have nothing to do with giving you the facts needed to make a decision. You will be given information based on what you are most interested in. What will keep you engaged. In other words, WE DO NOT ALL SEE THE SAME INFORMATION when we research a topic on the internet. If we do not all have the same information, its no surprise we disagree on so much, so often.
For example, if a Christian and an atheist type in a question like "Was Noah's Ark Real" or something like that, the information that is displayed will generally support the viewpoint of the person asking the question. The Christian, theoretically, would get results that support the narrative he already holds true, and the atheist would as well. Neither would have easy access to all of the same information the other has. You could do what you think is very detailed and thorough research and still primarily only see biased versions of the "facts" tailored to you.
Admittingly, having access to the same information certainly doesn't mean you will agree (how many different kinds of Christians are there all reading the same bible?). It also means that people who disagree with you aren't necessarily as dumb as they appear, they simply have been convinced based on different information. Perhaps if we all had the same information, we would find ourselves less divided?