I used a search program, not really a browser, that searches from many different sites like Google, DuckDuckGo, etc - i searched for “Daily Stormer” just for kicks to see what would show up and then about 5 minutes later i searched using a somewhat obscure search engine through a browser in a totally unrelated search term that had nothing whatsoever to do with the Alt-Right or politics and about number 6 in the results shows an article on Trump talking about Charlottesville several months ago.
I had this same feeling of being watched by Google about 4 years ago when searching for info on Benghazi - very strange results would show up, mixed in with the real results