to round out the story of the symbology, the other flags/placards being waved in that photo are "sabra" cactuses, prickly pears, available in green and red with a sweet fruit. "Sabra" is a common Israeli self-epithet, to mean something like "we are like sabras, prickly on the outside, sweet on the inside"; so those protesters are sending a "unity" sort of message by waving both.
I made my point in my comment, things are not just one meaning. Emojis do not just have one meaning. Words do not have one meaning (most of the time). Nobody would equate a watermelon for open source copilot for code analysis as being anti-Palestine or pro-Palestine or anti-Israel or pro-Israel. I don't understand why it was even brought up.
But I will say I completely disagree, nobody owns a symbol and I don't think it's acceptable to allocate emojis to specific events.