The reason for this is, Google has lost several defamation suits because people complained that stuff like crimes would show up after their names on autocomplete. For example: http://www.cnet.com/news/google-loses-autocomplete-defamation-suit-in-japan/
Google autocomplete algorithm will not show a predicted query that is offensive or disparaging when displayed in conjunction with a person’s name.
The fact that someone can whip up a quick video not based on fact or real evidence (or at least some control subjects to compare to), and have it blow up all over social media within 24 hrs is astounding. We live in a digital age. Approach everything with skepticism and do your own research.
For instance, when searching for "Bernie Sanders Com" on Google, you'll get results for "Bernie Sanders commercial," while Bing and Yahoo provide results related to communism. "Donald Trump sex" resulted in results about sexist remarks and sex scandals on Bing and Yahoo, while Google returned "Donald Trump Sex And The City"