The California case arose after two members of the Poway Unified School District Board of Trustees, Michelle O’Connor-Ratcliff and T.J. Zane, blocked parents Christopher and Kimberly Garnier from commenting on their Facebook page in 2017. O’Connor-Ratcliff also prevented Christopher Garnier from responding to her Twitter posts. Zane has since left office.

I really want to know what was the dispute that led to that.

This is the most I’ve found:

Christopher and Kimberly Garnier, who have children attending PUSD schools, often criticized the board of trustees. They began posting lengthy and repetitive comments on the Trustees’ social-media posts—for instance, nearly identical comments on 42 separate posts on O’Connor-Ratcliff ’s Facebook page and 226 identical replies within a 10-minute span to every tweet on her Twitter feed. The Trustees initially deleted the Garniers’ comments before blocking them from commenting altogether.

Which lmao, but it doesn’t say what the comments were about.

Edit:

In the years leading up to the dispute at issue in this case, the Garniers were especially vocal critics of the Board, particularly regarding race relations in the District, and alleged financial wrongdoing by then-Superintendent John Collins.

regarding race relations

Oh no. Still not specific enough though.