from the link posted earlier:
http://www.nbcnews.com/id/10372536/ns/world_news-americas/t/new-red-cross-logo-paves-way-israel-join/#.WicHZdKnHhl
The 192 signatories of the Geneva Conventions approved the new “red crystal” emblem by vote after last-ditch negotiations between Israel and Syria over Damascus’ demands for humanitarian access to Syrian citizens in the Golan Heights broke down.
The new emblem — a red square standing on one corner, with a blank white interior and a thick red border — was aimed at resolving the dispute with Israel but also could be used by any national society that feared the red cross used by most countries and the red crescent preferred by Muslim nations would not be respected by combatants.
Israel’s Magen David Adom rescue service has used a red Star of David to identify its ambulances and medical workers.
Magen David Adom, or Red Shield of David, could place a red star in the center of the crystal for humanitarian missions at home or abroad if a host country allowed it.
then over to the side a bit of history:
The International Red Cross has flown three flags since 1929. In 1863, Swiss humanitarians who adopted the red cross emblem, reversed the colors of the Swiss flag, without religious intent.