I would add to that his infamous “god and guns” speech, and his behavior in the primaries, including his shameful dance around the Jeremiah Wright issue.
Did his Facebook ads specifically take advantage of the fact that he was black? Did his ad campaign benefit from inflaming racial divisions?
To be fair, advertising from the trump campaign may not have played on racial tensions either. The thing people are upset about is the russian interference. The russians bought ads and made posts that clearly stoked tensions, and Facebook was negligent in preventing this.
That was not the claim. The claim was that he "harvested" racial tensions. And of course he did.
https://news.gallup.com/poll/107770/most-say-race-will-facto...
Blacks were 19% more likely to vote for Obama because he was black and 2% less likely. Whites were 5% more likely to vote for Obama because he was black and 6% less likely.
https://www.telegraph.co.uk/news/politics/local-elections/20...
Obama ended up with near-unanimous support from the black vote in the primaries, beating Hillary.