I think a lot of people here seem to be missing the staggering part of this: the mural is overtly, pointedly anti-slavery, anti-colonialism, anti-George Washington, but it's being destroyed because the school board is claiming it's the opposite.
Truly Orwellian.
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.
I wouldn't be too surprised though if SF turns out to be the first place to burn books this century.