It's unfortunate that some people wave another country's flag just to show solidarity with its people. It doesn't. Used in that way it devalues the people of both countries.
On the other hand, displaying both own and another can be supportive, provided that the protocols of flag display are observed.
@Earl-of-Trumps saidExactly the same. I hold no personal brief for Israel or Palestine, I must rely on international media which means I cannot obtain an informed, fair and balanced judgment.
BTW, Kewpie,
What would you say about an American that flies the Israeli flag?