I don't get the comment here, they didn't 'express their opinion' about Israel. They behaved like a bunch of lunatics within Google's offices. If you want to protest Google's actions send a signed letter of resignation stating the reason, send it to the press and form a union of techies that won't work for companies that work with Israel recursively.
On a side note, I like how none of them mind building mass surveillance tools, pushing ads, Google-China relations, etc... But Israel's genocide is trending, so they jump on that. What a bunch of shallow fucks.