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.
https://www.greenprophet.com/wp-content/uploads/blur-botanic...
