Welcome to white privilege.
When you see an armed white guy standing at a ballot box or a polling place, you think, “huh, I wonder how anybody can read his mind. He could be glowering at anybody.”
Some people don’t need to guess. And because that history is there, because that just-barely-subtext is there, they don’t have to ‘actively’ harass anybody. They just need to be there. The weight of history does the heavy lifting for them.
Beyond that, anybody with any kind of liberal identification on their vehicle is going to think twice about voting.