>That's probably because that has been overplayed. The President, whatever his beliefs doesn't change America's racism (or lack thereof), in the same way there was a record of police shootings of blacks etc. under Obama.

You are underestimating the effect of a racist speech coming from a person in a position of power. Racists tend to keep their views for their own when are not sure they can speak freely without being judged. When they can speak freely they turn up the tone of the speech (which happened in Trump's rallies).

In Venezuela we had a similar situation when Chavez came to power, not with race but with economical status... At some point you could be yielded at the street just because the way you were dressed (didn't have to be fancy). All that was unheard before Chavez.

So yeah... A bad president can indeed reshape the view and behavior of people. Just wait until he has their own tv show as Chavez did.