I agree except for your very last bit.
I don't want to be too presumptuous re GT's autism, but those mood octopuses can be turned from happy/positive to sad/pissed off, and it might be that she uses it to reflect how she's feeling. It's not an unusual toy to have - they seem quite popular at the moment. On the other hand, antisemitism is still a big problem the world over and a wariness of potential dog-whistles is understandable.
However, I do question the jumping from a possible "hmm..." to a
Spectator journalist's:
"A blue octopus is a Nazi trope for anti-semitism. A 1938 Nazi cartoon depicts the Jews as an octopus, its tentacles wrapped around the globe. Nothing to do with climate change or the Israel/Palestinian conflict. Pure, old fashioned, race hatred of the worst kind."
ETA Posted before I'd seen the above posts including GT's response.