I apologize for the disrespectful tone. I can guess how they might scan and collect the information from the newspaper archives. - there is lots of information being digitized. But to suggest that google is trying to expose you for dissent is .. hard to believe. What did you dissent to and why would they even care? Also the info pops up in a search because the weekly paper digitally republished it - not Google. The letter appears because the newspaper probably  updated/digitized its archives of issues and made that available to the internet,  which google can search and find. Good day to you.