The conflict between Israel and Hamas is fast becoming a world war online.

Iran, Russia and, to a lesser degree, China have used state media and the world¡¯s major social networking platforms to support Hamas and undercut Israel, while denigrating Israel¡¯s principal ally, the United States.

Iran¡¯s proxies in Lebanon, Syria and Iraq have also joined the fight online, along with extremist groups, like al-Qaida and the Islamic State, that were previously at odds with Hamas.