It's not just the school board that's claiming that. If you look at the Guardian article, for example, it presents the claim that the mural is pro-slavery and p

It's not just the school board that's claiming that. If you look at the Guardian article, for example, it presents the claim that the mural is pro-slavery and pro-colonialism as simply and indisputably correct, and claims to the contrary as a rebutted error of a few wrong-thinking people: https://www.theguardian.com/us-news/2019/jun/27/san-francisco-high-school-murals-painted-over https://www.theguardian.com/us-news/2019/jun/27/san-francisc... Remember, any right-thinking leftwing supporters of social justice wouldn't be caught dead reading or believing an article by right-winger Bari Weiss. Doing so would instantly mark them out as a supporter of the enemy. As far as they're concerned (or at least can admit to in public), it will be the people who think this artwork means what the artist created to mean who are ignoring reality.