This defense doesn't seem to working out too well for Fatah combatants in Gaza. The U.K. Telegraph's Charles Levinson writes from Gaza:
"They're firing at us, firing RPGs, firing mortars. We're not Jews," the brother of Jamal Abu Jediyan, a Fatah commander, pleaded during a live telephone conversation with a Palestinian radio station.
Minutes later both men were dragged into the streets and riddled with bullets.
Keep in mind that former President Jimmy Carter wants us to offer support to Hamas, the ruthless faction apparently driving Fatah out of Gaza, which will result on a Fatah-controlled West Bank and Hamas-controlled Gaza. I suppose the demand will be that Israel negotiate with both, in between their attacks on each other.