If you aren't sure whether you are part of the "Jewish establishment," I submit to you: Do you belong to a synagogue? Do you send your kids to Jewish camp? Jewish school? Do you work out at the JCC? Do you donate to the Jewish Federation?
Instead of a person's values coming to carefully inform one's opinions on the Israeli-Palestinian conflict, what I'm seeing is the reflexive taking of sides. What could be a very fruitful discussion about values, ethics and policy instead comes to resemble a boxing ring, with everyone in their corners primed to fight.