In your defense, that may be the surface level interpretation of what I said. However, I am not saying that in any way shape or form. Closer to what I'm saying is that, censorship artificially reduces the number of monsters in our polity that we are able to identify. They are prevented from expression so we don't hear or see them and thus have the mistaken belief that more progress has been made when that couldn't be further from the truth.
I want people to be open with their racism/bigotry, so that I know to steer clear.
It's all well and good to be able to identify these people, but the downside is that their victims have to put up with more racism and bigotry.
Frankly, if we drive it underground, great! Let's keep driving it underground until it suffocates.
Your argument is that, if society was more tolerant of bigots and their symbols, then Dylan Roof might not have murdered nine people? History indicates otherwise: the US was a lot more tolerant of racism in the past and there was a lot more violence.