You can do what you like. You won't stop a c*** being a c***. Some people are beyond reason. The greatest danger with generic gestures, is that they only serve to preach to those that are already enlightened enough not to need it.
I know some racists, sexist, misogynists, pretty much across the spectrum of race. You can take the knee all day long, they are impervious to reason, hence their stance.
Exactly