Some of us believe that the answer to a world which is chock full of scary things beyond our control is to learn to live internally without fear, not to impose our personal delicate sensibilities on upon others. This isn't cowardice and this kind of shaming only turns moderates away from your cause. Furthermore nonsense like microaggressions are effectively a form of thought control and when whiteness is treated as some original sin together with a completely subjective system of rules you have a social structure which is effectively designed to be abused for the transfer of power, while ostensibly claiming to be a champion of equality.
Are you really surprised that people turn away from an ideology which treats them as though they owe the world something, or need to change their behavior, for the color of their skin? We used to call that racism. Now it's increasingly normalized and shoved in our faces if we want corporate work. Frankly, people are tired of the bullshit and I'm worried about how far the pendulum is going to swing back.