Perhaps we haven’t defined our terms.

Criticizing the position of one’s political opponents is not being divisive. Republicans refusing to work with Democrats on health care, climate change, and infrastructure is. Republicans failing to rein in the insane conspiracy theories against Obama was also divisive. One can be a divisive figure because of how one’s opponents have characterized one’s actions and statements regardless of whether or not one caused that divisiveness themselves.

To your latter point, I don’t conflate personal racism with support for policies that perpetuate systemic racism. I’m glad Americans are less personally racist than they used to be; I’m not glad that the Voting Rights Act has been gutted.