In SF no less.

No surprise that this is happening.

I'm not too surprised, children are impressionable, and the white nationalist movement is strong right now.

There are pockets out here that are very white, and very christian, and that mix leads to white nationalism. It's usually towards the central valley, but gentrification has shoved a bunch of that into the core of the big cities.

Public schools are also involved.

without a comparison it's less meaningful as it creates an artificial situation where it seems like SF has an inordinate increase in anti-semitic activity. Knowing how this compares with other places gives data, this is just an observation.