The simple answer is, “Yes, it could.” The success rate on a high scale is highly doubtful. It takes an individual with an open mind and more extroverted personality to open up to strangers with differing opinions in order to consider participating in a discussion that might turn into a debate.
After reading the reviews of Uzi Hummus on TripAdvisor, it appears as those who have bothered to post a review are primarily from Israel or European countries. This isn’t surprising as the vast majority of Arabs are not allowed into Israel. When the SO and I were there for a week a few years ago, the Israeli tour guide had to make arrangements to swap places with a Palestinian guide at the Western Wall checkpoint in order to continue the tour. Same tourist company; restrictive rules by country. We outsiders found this odd, weird, appalling. Yet similar scenarios exist in our own world when it comes to dining with others.
I’ve only lived in the US, and have seen this concept pulled off without physical harm, but I can’t say that as either a server or a customer that it has been effective. Sometimes it just takes time to digest what, if any differing opinion, has been shared.