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.