His case: Well, Obama was elected.
Not much of a case. Obama lost the white vote in a landslide in 2012. He lost to Romney 59-39. He held on to the White House because he won 93% of the black vote and more than 70% of the other minorities
Of every 100 voters in that election:
72 were white and they split 29-43 Romney
13 were black and they split 12-1 Obama
13 were Latino or Asian and they split 10-3 Obama
The strongest case that racism is deeply ingrained in the USA: in a 2016 poll, only 27% of Republicans agreed with this statement: “Barack Obama was born in the United States,” despite the fact that there was never any logic or evidence to support their belief and an overwhelming mountain of evidence of Obama’s birth in Hawaii.
Let’s be honest. There’s only one reason to hold that belief, as summed up in this clip: