Someone posed the question "I don't know why the steppers choose to read and comment on this site ..."
Guess the short answer is "counter speech".
"Speak up: Clicking to report hate speech to an online host is not all we can do. Justice Louis Brandeis, in a 1927 Supreme Court case, extolled the virtues of "counter-speech" to address objectionable speech.
That pre-Internet admonition applies full force to online messages today. Hate speech legitimizes discrimination, and many of the people who post it believe no one objects. So object. Speak up to counter the lies of hate speech or the inappropriate online conduct directed at minorities. Just as the Internet provides thoughtless haters with broadcasting tools, each of us has those same tools at our disposal. A little counter-speech can go a long way."