https://www.recode.net/2017/9/25/16363920/facebook-russia-ads-interference-election-social-divisions-tensions

Some of the suspicious Facebook ads purchased by Russian agents ahead of the 2016 presidential election were aimed at influencing its outcome by preying on racial, religious and other social tensions in the United States, according to two sources familiar with the matter.

At times, these Kremlin-sourced ads even played on both sides of an issue — advancing and opposing causes including Black Lives Matter and gun control, for example — in a bid to stir potential political unrest, said the sources, confirming a report by The Washington Post on Monday.