Clickbait headline:
"Greta Thunberg posts then deletes 'free Palestine' post after pushback: 'I was completely unaware'"
So, can you guess what she was unaware of? (I, too, was unaware.) It's that the octopus
is sometimes used as an anti-Semitic symbol, representing a many-armed conspiracy.
(It makes sense in context, but isn't a satisfying story.)