I don't disagree with the potentially powerful impact of more collaborative work in education, I just think actually making that work requires facing issues like this head-on. I have many friends who've gone through a CS PhD and had to weave a very complicated dance around discriminatory people, this is treated as so common it is rote, and I ask myself, "do we have a situation that justifies the type of intervention that in the abstract sounds good?" A lot about stuff like this.