> once they decided to get into the game of determining what is and what is not the truth is where they step over the line.
Why shouldn't they? If I search for information about the Earth, I don't want to see a bunch of flat Earth crap. If I search for information on vaccines, I don't want to have to sift through anti-vax results, no matter how popular they are.
People use Google because they think the results are good. Google's bet is that one reason people for this is that they surface true information. Therefore, they penalize information they assess likely to be false. If users disagree with Google's assessment — i.e. it buries valuable information or surfaces worthless information — they'll use another search engine.