sorry, but I don't see anywhere that she thinks that Israel doesn't have the right to exist. According to the article, she;
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told Katz that she believed Israel had been occupying Palestinian territories since 1948, the year of Jewish independence,
Technically true. Still, given that the Palestinians tried to take away Jewish lands in 1948, I'm not inclined to care that much.
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and also that she supported a campaign to boycott and sanction the democratic state.
Nothing wrong with that, everyone is entitled to their own opinions. People call for boycotts all the time, from banning French to Danish to Canadian goods.
So what? It's a free country. It's not like she said someone should nuke Israel like that wacko in Iran.