I've watched this thread, and this story more broadly, unfold for the last day or so. I've kept quiet in relation to it and absorbed a range of dialogues, across a number of channels. And to be clear from the outset, I am Jewish. In my mind, the question here isn't exclusively about whether the FA harassed the passenger, but concurrently about whether the passenger felt intimidated. Now I absolutely acknowledge that "Harry Grafa" is not Jewish and appears to have been looking for some attention. He clearly wasn't intimidated by the flag. I do not agree with his approach to this issue.
But with that said, had I been a passenger with this FA, as a Jew, I absolutely would have felt intimidated. I have had convoys driving through my suburb, which is a hotspot for people of my faith, with Palestinian flags chanting "from the river to the sea" with no intention other than to provoke and instil fear. I have seen anti-Israel and anti-Jewish posters plastered over 'free the hostages' posters, again in my area, which has one of Sydney's largest Jewish populations. I have seen the steps of the Sydney Opera House flooded with these same flags while chants of "gas the Jews" ring out. So when you view the FA's actions through this lens, it shouldn't be difficult to see why a Jewish person may have felt intimidated in these circumstances, being trapped in a metal tube travelling through the air, with minimal (no) safeguards and protections.
One thing that I've really come to grapple with over the last few months is that multiple things can be true at the same time - it may be true that the FA wasn't harassing anyone and didn't have the slightest intention to do so, but it may also be true that someone could nonetheless feel intimidated by the flag in a confined, inescapable environment.
Qantas has made it clear that they do not wish to get involved in the politics behind the issue, understandably so. It is then for them to ensure that their employees adhere to the policies they put in place. I have absolutely no issue with whatever views the FA in question may have, but I don't believe an airplane is an appropriate or safe place to push these views.