It's only the textbook symbol used by celebrities everwhere; especially in DC and California. I'm sure it's just a coincidence and that she's completely ignorant of how the world works. ;)
I just did a quick Google, her tweet mentioned Mauna Kea then a quick Google showed the same hand symbol.
You could be right, just if so, she put a lot more effort into the lie. Rather then just having a different local meaning.
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