I have no respect for this argument.
It's similar to asking was the end of Jim Crow or slavery progress or the destruction of white spaces and to be sensitive to the people who wanted those to continue. I think a lot of the issues we have today are because people in both periods did not ostracize those people like Europe ostracized the Nazis.
Having a main character that isn't a straight white male is so minor in comparison. But giving that idea credence is a dangerous path backwards to those arguments of the past